Kamnitzer, P. and Hoffman, S., "INTUVAL: An Interactive Computer Graphic Aid for Design and Decision Making in Urban Planning"

Proceedings of EDRA 2, Environmental Design Res. (1970) Proceedings of EDRA 2, Environmental Design Res. Assoc. Conf, Archea, J. and Eastman, C. (Editors), Pittsburgh, Pennsylvania, 1970  

Languages mentioned INTUVAL {1970} Visual language for describing urban scapes