000 00376nam a2200157Ia 4500
008 230524s9999 xx 000 0 und d
050 _aQ181.U475
245 0 _aNew Unesco source book for science teaching
260 _aNew Delhi
260 _c1978
300 _a270p.
300 _c23cm.
700 _aill.
942 _2Library of Congress Classification
942 _cBook
999 _c9365
_d9365