00263nam a22000977a 450000500170000000800410001702000140005804000080007224500400008026000450012020200901143549.0200901b           ||||| |||| 00| 0 eng d  a713609362  cCML  aApproach to Mathematics.cMarsh, L.  aGreat BritainbA. and C. Black Ltdc1969