(1971). Environmental planning and geology: Proceedings of the Symposium on Engineering Geology in the Urban Environment. Washington, D.C: Geological Survey department : U.S. Department of the Interior : Office of Research and Technology : U.S. Departmet of Housing and Urban Development.
Παραπομπή Chicago StyleEnvironmental Planning and Geology: Proceedings of the Symposium On Engineering Geology in the Urban Environment. Washington, D.C: Geological Survey department : U.S. Department of the Interior : Office of Research and Technology : U.S. Departmet of Housing and Urban Development, 1971.
Παραπομπή MLAEnvironmental Planning and Geology: Proceedings of the Symposium On Engineering Geology in the Urban Environment. Washington, D.C: Geological Survey department : U.S. Department of the Interior : Office of Research and Technology : U.S. Departmet of Housing and Urban Development, 1971.