00279nam a22000977a 450000500170000000800410001702000110005804000080006924500600007726000440013720200831141635.0200831b           ||||| |||| 00| 0 eng d  a025305  cCML  aBasic Concepts of Elementary Mathematics.cSchaaf, W.L.  aNew YorkbJohn Wiley & Sons, Inc.c1960