Specialty Conference on Performance of Earth and Earth-Supported Structures Purdue University, Purdue University. School of Civil Engineering, & American Society of Civil Engineers. Soil Mechanics and Foundations Division. (1972). Proceedings. American Society of Civil Engineers.
Cita Chicago (17th ed.)Specialty Conference on Performance of Earth and Earth-Supported Structures Purdue University, Purdue University. School of Civil Engineering, i American Society of Civil Engineers. Soil Mechanics and Foundations Division. Proceedings. New York: American Society of Civil Engineers, 1972.
Cita MLA (8th ed.)Specialty Conference on Performance of Earth and Earth-Supported Structures Purdue University, et al. Proceedings. American Society of Civil Engineers, 1972.