00336nam a2200121Ia 4500008004100000022001400041040001100055100002300066245001200089260008600101300001600187300001100203251112s9999||||xx |||||||||||||| ||und||  a0036-8075  aCNCLSA  aCharles J. Arntzen 0aScience  cMay 15, 1992bThe American Association for the Advancement of ScienceaWashington  aP. 937-1876  bV. 256