Letters Trading upon Science See allHide authors and affiliations Science 11 Dec 1964:Vol. 146, Issue 3650, pp. 1417-1418DOI: 10.1126/science.146.3650.1417-a Paula GieseFind 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 146, Issue 365011 December 1964 Table of Contents Print Table of Contents Ed Board (PDF) Front Matter (PDF)
