000 00288nam a2200121 4500
222 _aUNESCO
362 _a1983
245 _aUNESCO : New Trends in School Science Equipment
246 _aParis.UNESCO
653 _aUNESCO-Aids-Science-Education
653 _a1983
650 _aSc.&Tech.
999 _c89641
_d89641