00269nam a2200109 a 4500008004100000050001500041100002100056245001700077260003200094300002400126350000900150120416s1927    ||||||||||||||||| ||    u  aQA 531 Cra  aCrawley, Edwin S10aTRigonometry  aNew YorkbF.S. Croftsc1927  a(xxxvi),266p. : ill  a0.00