Letters Computer searches See allHide authors and affiliations Science 01 Jul 1988:Vol. 241, Issue 4861, pp. 12DOI: 10.1126/science.3388009 PATRICIA R BRISTORFind 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 241, Issue 486101 July 1988 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)
