00468nam a2200157Ia 4500003000900000008004100009020001800050040001600068080001500084110004600099245006200145260003500207300001000242650004100252650001700293IN-BaIIA211028s9999    xx            000 0 eng d  a0-85229-486-7  cIIA Library  a58bENB-88  aUnited States. Government Printing Office 0a1988 Britannica book of the yearcEncyclopedia Britannica  aChicagobL.B. Publishersc1988  a910p.  aAstronomy and Astrophysics Thesaurus  aEncyclopedia