000 00290nam a2200121Ia 4500
008 220201s1968 xx 000 0 eng d
082 _a530.11
100 _aSears, Francis W
245 0 _aIntroduction to the theory of relativity
260 _bLondon
_c1968
300 _a216
942 _2ddc
999 _c74518
_d74518