Letters Letter to the Editor See allHide authors and affiliations Science 19 Oct 1973:Vol. 182, Issue 4109, pp. 222DOI: 10.1126/science.182.4109.222-a T. HealeyFind 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 182, Issue 410919 October 1973 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)
