00339nam a2200133Ia 4500008004100000020001100041040001600052041001200068082002100080100001400101245004500115260003400160300001100194230917s9999||||xx |||||||||||||| ||und||  cRS1100  e31930aMAIN  aEnglish  a372.304403 D262E  aDat, Poly 0aEncyclopaedia of teaching of science. V1  aNew DelhibSarup & Sonsc2000  a343 p.