Association AffairsInside AAAS INSIDE AAAS Science 02 Feb 1990:Vol. 247, Issue 4942, pp. 578DOI: 10.1126/science.247.4942.578 Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.
Science Vol 247, Issue 494202 February 1990 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)