00297nam a2200109Ia 4500008004100000040001100041100002200052245001200074260007800086300001400164300000900178251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aPhilip H. Abelson 0aScience  c1976bThe American Association for the Advancement of ScienceaWashington  aP. 1-1448  bV.69