Letters Letters to the Editor By Robert G. Glasser See allHide authors and affiliations Science 30 Aug 1968:Vol. 161, Issue 3844, pp. 845DOI: 10.1126/science.161.3844.845 Robert G. Glasser 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 161, Issue 384430 August 1968 Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)