Human origins: A manual of prehistory. 2 vols.

A detailed and extensively illustrated summary, with detailed bibliographical references, of the state of knowledge of prehistory in Europe as of 1926. Appendix 1: "Stratigraphic Study of Paleolithic Sites" is a very useful inventory of sites then known with detailed bibliographies of literature on each site. Appendix 2: "Repertory of Paleolithic Art" provides a similar reference for this aspect.