00481nam  22001693  4500001000700000010001800007100004100025101000800066102000700074200008600081210004500167215001100212606002600223675001800249675001600267702002800283171803  a0-309-04234-8  a20140408d        u||y0frey50      ba  aeng  aUS  aOn the Shoulders of Giants : New Approaches to Numeracyged. by Lynn Arthur Steen  aWashingtoncNational Academy Pressd1990  a232 p.  aDidactica matematicii  a37.016:51=111  a51(072)=111  4340aSteenbLynn Arthur