00261nam a2200109Ia 4500008004100000040001100041100002200052245001200074260004200086300001300128300001000141251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aPhilip H. Abelson 0aScience  cApril, 1975bAcademic PressaNew York  aP. 1-657  bV. 62