000 00285pam a2200121a 44500
010 _a68011537
082 _a530.11
_bB454R
100 _aBergmann, Peter G.
245 1 _aTHE RIDDLE OF GRAVITATION
260 _a
_bCharles Scribner'S Sons
_c1968
964 _gCIRC
997 _aK13601 W
999 _c379863
_d379863