00515nam a2200181Ia 450000500170000000800410001704000190005804100120007708200150008910000170010424500840012126000420020530000170024750400190026465000250028370000150030885000100032320240529102536.0131103s9999    xx            000 0 und d  aLoreto College  aEnglish  a510.7bDOW  aDownes, L.W. 4aThe teaching of arithmetic in tropical primary schoolscL.W.Downes and D.Paling  aLondonbOxford university pressc1970  axxiv, 500p.   aIncludes index  aMathematics - method  aPaling, D.  aLCBED