00317nam a2200121Ia 4500008004100000040001600041041001200057082001600069100001500085245005200100260002700152300001600179230917s9999||||xx |||||||||||||| ||und||  e82215aMAIN  aEnglish  a372.3 G959T  aGupta, V K 0aTeaching and learning of science and technology  aNew DelhibVikasc1995  axix, 338 p.