Association AffairsInside AAAS

AAAS Briefs

See allHide authors and affiliations

Science  01 Dec 1989:
Vol. 246, Issue 4934, pp. 1177
DOI: 10.1126/science.246.4934.1177-a

This is a PDF-only article. The first page of the PDF of this article appears below.

PDF extract preview