diff --git a/gprMax/cmds_geometry/add_grass.py b/gprMax/cmds_geometry/add_grass.py
index 90c5b64f..ab8176ad 100644
--- a/gprMax/cmds_geometry/add_grass.py
+++ b/gprMax/cmds_geometry/add_grass.py
@@ -11,11 +11,11 @@ import numpy as np
 
 
 class AddGrass(UserObjectGeometry):
-    """Allows you to add grass with roots to a :class:`FractalBox` in the model.
+    """Allows you to add grass with roots to a :class:`gprMax.cmds_geometry.fractal_box.FractalBox` in the model.
 
-    :param p1: The lower left (x,y,z) coordinates of a surface on a :class:`FractalBox`
+    :param p1: The lower left (x,y,z) coordinates of a surface on a :class:`gprMax.cmds_geometry.fractal_box.FractalBox`
     :type p1: list, non-optional
-    :param p2: The lower left (x,y,z) coordinates of a surface on a :class:`FractalBox`
+    :param p2: The lower left (x,y,z) coordinates of a surface on a :class:`gprMax.cmds_geometry.fractal_box.FractalBox`
     :type p2: list, non-optional
     :param frac_dim: is the fractal dimension which, for an orthogonal parallelepiped, should take values between zero and three.
     :type frac_dim: float, non-optional
@@ -23,7 +23,7 @@ class AddGrass(UserObjectGeometry):
     :type limits: list, non-optional
     :param n_blades: The number of blades of grass that should be applied to the surface area.
     :type n_blades: int, non-optional
-    :param fractal_box_id:  An identifier for the :class:`FractalBox` that the grass should be applied to
+    :param fractal_box_id:  An identifier for the :class:`gprMax.cmds_geometry.fractal_box.FractalBox` that the grass should be applied to
     :type fractal_box_id: list, non-optional
     """
 
diff --git a/gprMax/cmds_geometry/add_surface_roughness.py b/gprMax/cmds_geometry/add_surface_roughness.py
index f8c12869..db5c5ed0 100644
--- a/gprMax/cmds_geometry/add_surface_roughness.py
+++ b/gprMax/cmds_geometry/add_surface_roughness.py
@@ -10,11 +10,11 @@ import numpy as np
 
 
 class AddSurfaceRoughness(UserObjectGeometry):
-    """Allows you to add grass with roots to a :class:`FractalBox` in the model.
+    """Allows you to add grass with roots to a :class:`gprMax.cmds_geometry.fractal_box.FractalBox` in the model.
 
-    :param p1: The lower left (x,y,z) coordinates of a surface on a :class:`FractalBox`
+    :param p1: The lower left (x,y,z) coordinates of a surface on a :class:`gprMax.cmds_geometry.fractal_box.FractalBox`
     :type p1: list, non-optional
-    :param p2: The lower left (x,y,z) coordinates of a surface on a :class:`FractalBox`
+    :param p2: The lower left (x,y,z) coordinates of a surface on a :class:`gprMax.cmds_geometry.fractal_box.FractalBox`
     :type p2: list, non-optional
     :param frac_dim: is the fractal dimension which, for an orthogonal parallelepiped, should take values between zero and three.
     :type frac_dim: float, non-optional
@@ -22,7 +22,7 @@ class AddSurfaceRoughness(UserObjectGeometry):
     :type weighting: list, non-optional
     :param limits: Define lower and upper limits for a range over which the roughness can vary.
     :type limits: list, non-optional
-    :param fractal_box_id:  An identifier for the :class:`FractalBox` that the roughness should be applied to
+    :param fractal_box_id:  An identifier for the :class:`gprMax.cmds_geometry.fractal_box.FractalBox` that the roughness should be applied to
     :type fractal_box_id: list, non-optional
     :param seed:  Is an optional parameter which controls the seeding of the random number generator used to create the fractals.
     :type seed: int, optional
diff --git a/gprMax/cmds_geometry/add_surface_water.py b/gprMax/cmds_geometry/add_surface_water.py
index 4dbe13e1..802d0a12 100644
--- a/gprMax/cmds_geometry/add_surface_water.py
+++ b/gprMax/cmds_geometry/add_surface_water.py
@@ -8,15 +8,15 @@ from tqdm import tqdm
 
 
 class AddSurfaceWater(UserObjectGeometry):
-    """Allows you to add surface water to a :class:`FractalBox` in the model.
+    """Allows you to add surface water to a :class:`gprMax.cmds_geometry.fractal_box.FractalBox` in the model.
 
-    :param p1: The lower left (x,y,z) coordinates of a surface on a :class:`FractalBox`
+    :param p1: The lower left (x,y,z) coordinates of a surface on a :class:`gprMax.cmds_geometry.fractal_box.FractalBox`
     :type p1: list, non-optional
-    :param p2: The lower left (x,y,z) coordinates of a surface on a :class:`FractalBox`
+    :param p2: The lower left (x,y,z) coordinates of a surface on a :class:`gprMax.cmds_geometry.fractal_box.FractalBox`
     :type p2: list, non-optional
     :param depth: Defines the depth of the water, which should be specified relative to the dimensions of the #fractal_box that the surface water is being applied.
     :type depth: float, non-optional
-    :param fractal_box_id:  An identifier for the :class:`FractalBox` that the water should be applied to
+    :param fractal_box_id:  An identifier for the :class:`gprMax.cmds_geometry.fractal_box.FractalBox` that the water should be applied to
     :type fractal_box_id: list, non-optional
     """