Chris I. Yessios.
Computer drafting of stones, wood, plant and ground materials.
In Computer Graphics (Proceedings of ACM SIGGRAPH 79), pp. 190--198, 1979.

Bibtex:

@InProceedings{  yessios:1979:CDSW,
  author = 	 {Chris I. Yessios},
  title = 	 {Computer drafting of stones, wood, plant and ground
                  materials},
  booktitle =    {Computer Graphics (Proceedings of ACM SIGGRAPH 79)},
  pages = 	 {190--198},
  year = 	 {1979},
}