00586nam a2200181Ia 4500003000900000008004100009020001800050040001600068080001600084100002300100245006800123260003500191300001400226490007800240650001800318650002500336650004300361IN-BaIIA211028s9999    xx            000 0 eng d  a0-12-635250-X  cIIA Library  a524.83bSEG  aSegal, Irving Ezra 0aMathematical cosmology and extragalactic astronomycI. E. Segal  aNew YorkbAcademic Pressc1976  aix, 204p.  aPure and applied mathematics: a series of monographs and textbooks; v. 68  a Cosmology   a Galactic astronomy  aAstronomy and astrophysics thesaurus