00270nam a22000977a 450000500170000000800410001702000150005804000080007324500460008126000450012720200824150037.0200824b           ||||| |||| 00| 0 eng d  a0070021597  cCML  aProblem Continuing Education.cApps, J.W.  aNew yorkbMcGraw-Hall book Companyc1979