Association AffairsAAAS News Science Fellows Choose Hill Slots See allHide authors and affiliations Science 02 Dec 1977:Vol. 198, Issue 4320, pp. 918-919DOI: 10.1126/science.198.4320.918-a Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.
Science Vol 198, Issue 432002 December 1977 Table of Contents Print Table of Contents Ed Board (PDF) Front Matter (PDF)