Letters Retreat See allHide authors and affiliations Science 01 Sep 1972:Vol. 177, Issue 4051, pp. 746DOI: 10.1126/science.177.4051.746-c Eleanor O. GrigasScience Information Department, Squibb Institute, for Medical Research, Princeton, New Jersey 08540Find 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.
Science Vol 177, Issue 405101 September 1972 Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)
