00546nam a2200181Ia 4500003000900000008004100009040001600050080001500066245005300081260004700134300001600181650002800197650004100225650002500266650003200291650001600323700002500339IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a520.8bTRA 0aTrackers of the skiescedited by Hayes E. Nelson  aCambridgebHoward A Doyle Publishingc1968  axiii, 169p.  aAstronomical techniques  aAstronomy and astrophysics thesaurus  aObserving techniques  aSatellite borne instruments  aSky surveys  aHayes, E. Nelson ed.