Letters Letters to the Editor See allHide authors and affiliations Science 02 Jul 1965:Vol. 149, Issue 3679, pp. 7DOI: 10.1126/science.149.3679.7-b Peter A. WardFind 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 149, Issue 367902 July 1965 Table of Contents Print Table of Contents Ed Board (PDF) Front Matter (PDF)
