000 00293nam a2200109 4500
245 _aTeaching and learning of science and technology
_cV. K. Gupta
100 _aGupta ,V.K.
260 _aDelhi
_bVikas
_cc1995
300 _axix,338p. :tables. ;21cm.
020 _a0706989597
082 _a507
_bGUP
999 _c61382
_d61382