00456    a2200157   4500001000700000003000400007005001700011008004100028082001600069100002000085245011000105260003800215300001000253700001800263700001700281132691OSt20220128112202.0                                          a519.7bC66A1 aCohen, Arjen M.1 aAlgebra interactive : learning algebra in an exciting waycby Arjen M. Cohen, Hans Cuypers and Hans Sterk  aHeidelbergbSpringer-Verlagc1999  a159p.  aCuypers, Hans  aSterk, Hans