@book{Le_Gros_Clark1955-cc, author = "W. E. L. G. Clark and Clark and B. G. Campbell", title = "The Fossil Evidence for Human Evolution: An Introduction to the Study of Paleoanthropology", year = 1955, publisher = "University of Chicago Press", url = "https://play.google.com/store/books/details?id=-pU5AAAAMAAJ", isbn = "9780226109381" }