Association AffairsInside AAAS Providing Journals + See all authors and affiliations Science 04 Aug 1989:Vol. 245, Issue 4917, pp. 538DOI: 10.1126/science.245.4917.538 LISBETH A. LEVEYFind 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 below.
Science Vol 245, Issue 491704 August 1989 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)
