00375nam a22001217a 450000500170000000800410001702000150005805000160007310000290008924500640011826000450018230000260022720260407115204.0260407b        |||||||| |||| 00| 0 eng d  a0876922442  aQC6.B4 1987  aPeter gabriel bergmann /  aIntroduction to the theory of relativity cby Bergmann P.G   aNew delhibPrentice hall of india c1987  axvi,287p. :ills,bHbk