000 002920000a22001210004500
008 160429b1954 xxu||||| |||| 00| 0 eng d
041 _aeng
080 _a621.3
_bU5
942 _cBK
110 _aUnesco
245 _aInventories of apparatous and materials for teaching science
260 _c1954
999 _c8419
_d8419