00385cam a2200145ua 4500020001000000041001000010082001800020100001700038245009000055250001200145260005500157300001200212365001000224504000500234  c18.62  aengh  a531.3bRAM/IN  aRamsey, A.S.  aIntroduction to the theory of newtonian attraction / cA S Ramsey.hTextual Documents  a1 / b.  aCambridge : bCambridge University Press , c1961.  a183 ; .  a18.62  a