Book Reviews Old World Herbivores: Colobine Monkeys. + See all authors and affiliations Science 12 Jan 1996:Vol. 271, Issue 5246, pp. 156-157DOI: 10.1126/science.271.5246.156b Richard F. KayFind 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.