Letters Human Ecology By Cornelius H. Muller See allHide authors and affiliations Science 01 Feb 1974:Vol. 183, Issue 4123, pp. 368DOI: 10.1126/science.183.4123.368-a Cornelius H. Muller Find 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 above.