00878nam0-22003011i-450-990001064330403321000106433FED01000106433(Aleph)000106433FED0100010643320000920d1966----km-y0itay50------baengBuilding Mathematical Competence in the Elementary SchoolP.L. Spencer, M. BrydegaardLondon [etc.]HoltRinehart & Winston1966xii, 433 p.25 cmP.s.s.c.Esercizi di fisica530Spencer,P.l.347333Brydegaard,M.ITUNINARICAUNIMARCBK99000106433040332120D-0375029FI1FI1Building Mathematical Competence in the Elementary School340320UNINAING01