000 00306nam a2200133Ia 4500
008 210901s1968 xx 000 0 eng d
082 _a503 POP
100 _aPopular
245 4 _aThe book of popular science
260 _aNew York
_bGrolier
_c1968
300 _a480
650 _aScience
942 _2ddc
_cBK
999 _c6267
_d6267