00291nam a2200097Ia 4500008004100000040002900041050002100070100001900091245005000110260003300160230222s9999||||xx |||||||||||||| ||und||  cChuka University Library  aTA 329 bC5 1944  aChurchil, R V. 0aModern operational mathematics in engineering  aMc Graw HillbNew yorkc1944