000			00587nam a2200241Ia 4500
001			CATREF006001
008			110517s9999 xx 000 0 und d
041			_aeng
082			_a510.07
100			_aBrueckner, Leo J
245			_aDeveloping mathematical understandings
260			_aPhiladelphia _bThe John C Winston _c1957
300			_av, 567 p. _c21 cm.
546			_bRoman
650			_aAlgebra
650			_aGeometry, Informal
650			_aMathematics
650			_aMathematics
700			_aReckzeh, John
906			_a005119
906			_atext
942			_cBook
999			_c257258 _d257194