00325nam a2200121Ia 4500008004100000040001700041041001200058082001500070100001800085245005600103260003000159300001400189230917s9999||||xx |||||||||||||| ||und||  e139732aMAIN  aEnglish  a509.2 A37B  aAsimov, Isaac 0aBiographical encyclopedia of science and technology  aNew YorkbDoubledayc1964  ax, 662 p.