000 00316nam a2200121 4500
020 _a978-8171415489
022 _a8171415482
100 _aD. B. Rao
245 _aInternational Encyclopaedia of Science and Technology Education
260 _aNew Delhi
_bDiscovery Publishing House
_c2016
300 _a662
942 _cBK
999 _c4320
_d4320