This Week in Science This Week in Science Science 06 Mar 1987:Vol. 235, Issue 4793, pp. 1123DOI: 10.1126/science.235.4793.1123 Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.
Science Vol 235, Issue 479306 March 1987 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)