000 00370cam a2200145 4500
020 _a9231010581
082 0 0 _a507
_bNEW.N
084 _2Colon Classification
245 1 0 _aNew Unesco source book for science teaching /
260 _aNew Delhi :
_bOxford,
_c1973.
300 _a270p. :
_billus., fold. col. map.
650 0 _aScience
650 0 _aScience
942 _cBK
999 _c623151
_d623151