00277nam a22000977a 450000500170000000800410001702000150005804000080007324500540008126000440013520200828092508.0200828b           ||||| |||| 00| 0 eng d  a0356050009  cCML  aUsing the Environment 3 Tackling Problems Part 2.  aLondonbMacdonald Educational Ltdc1974