PT - JOURNAL ARTICLE AU - Guyer, Ruth Levy TI - <em>This Week in</em> Science AID - 10.1126/science.249.4974.1223 DP - 1990 Sep 14 TA - Science PG - 1223--1223 VI - 249 IP - 4974 4099 - http://science.sciencemag.org/content/249/4974/1223.short 4100 - http://science.sciencemag.org/content/249/4974/1223.full SO - Science1990 Sep 14; 249