000 00321nam a22001097a 4500
082 _a500
_bNCE.P
245 _aPreparation and evaluation of textbooks on general science /
260 _aNew Delhi :
_bNational council of educational research and training,
_c1973.
300 _a115p. :
650 _aText book
942 _cBK
999 _c616965
_d616965