00301nam a2200121Ia 4500008004100000040001600041041001200057082001500069100002300084245002400107260003400131300001400165230917s9999||||xx |||||||||||||| ||und||  e83855aMAIN  aEnglish  a372.3 S64T  aSingh, Uttam Kumar 0aTeaching of science  aNew DelhibCommonwealthc1997  av, 256 p.