000 00319nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a660.28213 W628
100 _aWHITEWELL,J.C
245 0 _aCONSERVATION OF MASS AND ENERGY
260 _aWALTHAM
_bBlaisdell Publishing
_c1969
300 _a23X15 469
942 _cBK
_2DDC
999 _c15038
_d15038