000 00280nam a2200121 4500
008 160616s 000 0
245 _aSpace mechanics
100 _aNelson, Walter C
100 _aLoft, Ernest E
500 _aB9:7 K21
942 _cBK
_2BK10139
080 _a523.01 NEL
999 _c10139
_d10139