00338nam a2200121Ia 4500008004100000022001400041040001100055100002300066245001200089260008800101300001600189300001100205251112s9999||||xx |||||||||||||| ||und||  a0036-8075  aCNCLSA  aCharles J. Arntzen 0aScience  cNovember, 1991bThe American Association for the Advancement of ScienceaWashington  aP. 909-1860  bV. 255