Letters Science funding By JONATHAN KATZ See allHide authors and affiliations Science 26 Apr 1991:Vol. 252, Issue 5005, pp. 490DOI: 10.1126/science.2020847 JONATHAN KATZFind 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 252, Issue 500526 April 1991 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)
