Letters Letter to the Editor By Harold T. Walsh See allHide authors and affiliations Science 05 Feb 1965:Vol. 147, Issue 3658, pp. 556DOI: 10.1126/science.147.3658.556-a Harold T. WalshFind 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 147, Issue 365805 February 1965 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)
