Book Reviews Social Behavior and Organization Among Vertebrates. William Etkin, Ed. University of Chicago Press, Chicago, 1964. xii + 307 pp. Illus. $7.50 + See all authors and affiliations Science 07 Aug 1964:Vol. 145, Issue 3632, pp. 568DOI: 10.1126/science.145.3632.568 P. MarlerFind this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.