000 00269nam a2200109Ia 4500
008 160710s1952 xx 000 0 und d
100 _aAYRES,ENGENE
245 _aENERGY SOURCES THE WEALTH OF THE WORLD
260 _bMCGRAW HILL
_c1952
300 _a270
942 _2ddc
_cB
999 _c21393
_d21393