00439nam a2200157Ia 4500003000900000008004100009040001600050080001200066100002700078245006600105250001200171260004400183300001400227650001400241700002600255IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a52bBAK  aBaker, Robert Horace 3aAn Introduction to astronomycR. H. Baker and L. W. Frederick  a7th ed.  aPrinceton, N. J.bD. Van Nostrandc1968  aix, 365p.  aAstronomy  aFrederick, Lawrence W