00318nam 2213246 450000100060000000300230000600500090002900800410003808200080007910000170008726000380010430000170014224500270015913246StarLibrary Marc Built20180420201711 ||||| |||||||||||amh  a510 aW. W. Sawyer b(England): Renguin Book `s c1969 a213 p: 16 cm aPrelude to Mathematics