Letters Classification Activity By Steven Aftergood See allHide authors and affiliations Science 08 Jul 1994:Vol. 265, Issue 5169, pp. 171DOI: 10.1126/science.8023136 Steven AftergoodFind 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 265, Issue 516908 July 1994 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)
