The product is a facsimile of the proceedings of the 13th Symposium on Rock Mechanics, held in 1972 in Chicago, Illinois. The focus of the symposium was on research related to the stability of rock slopes. Authored by Cording and published by the American Society of Civil Engineers, the document provides valuable insights and information on the topic of rock slope stability. This collectible item is a must-have for anyone interested in the field of rock mechanics and geotechnical engineering.