00697nam a2200205Ia 4500003000900000008004100009020001800050040001600068080001600084100002700100245008600127260004800213300001600261650004100277650001600318650001500334942000700349999001500356952012000371IN-BaIIA211028s9999    xx            000 0 eng d  a0-521-22523-X  cIIA Library  a531.51bDAV  aDavies, P. C. W.98554 4aThe forces of naturecP. C. W. Davies                                              aCambridgebCambridge University Pressc1979  aviii, 246p.  aAstronomy and astrophysics thesaurus  aGravity967  aRelativity  cBK  c6609d6609  00104070aBANbBANcGENd1980-10-06g228.00l0o531.51/ DAVp7350r2021-11-05v228.00w1980-10-06yBKGRs. 228.00