Letters State Science Projects By K. D. Mathur See allHide authors and affiliations Science 26 Jul 1968:Vol. 161, Issue 3839, pp. 317DOI: 10.1126/science.161.3839.317 K. D. Mathur 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 383926 July 1968 Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)