00506nam a2200169Ia 4500003000900000008004100009020001800050040001600068080001500084100001600099245008400115260004800199300001600247650004100263650002100304650001100325IN-BaIIA211028s9999    xx            000 0 eng d  a0-521-21344-4  cIIA Library  a52-76bCOO  aCook, A. H. 0aCelestial maserscA. H. Cook                                                     aCambridgebCambridge University Pressc1977  aviii, 135p.  aAstronomy and astrophysics thesaurus  aCelestial masers  aMasers