Letters Letters to the Editor By Ted S. Y. Koo See allHide authors and affiliations Science 13 Feb 1970:Vol. 167, Issue 3920, pp. 932DOI: 10.1126/science.167.3920.932-a Ted S. Y. Koo Find 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 above.
Science Vol 167, Issue 392013 February 1970 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)