00624nam a2200205Ia 4500003000900000008004100009020001800050040001600068080001600084100002100100245012000121250001200241260004800253300001500301650004100316650001500357650001000372650001500382650002100397IN-BaIIA211028s9999    xx            000 0 eng d  a0-521-20648-0  cIIA Library  a523.31bJEF  aJeffreys, Harold 4aThe earthbits origin history and physical constitutioncHarold Jeffreys                                             a6th ed.  aCambridgebCambridge University Pressc1974  axii, 574p.  aAstronomy and astrophysics thesaurus  aAtmosphere  aEarth  aGeophysics  aUpper atmosphere