00477nam a2200145Ia 4500003000900000008004100009040001600050080002200066110005200088245011800140260001700258300002300275650001400298650001900312IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a084.4:524.33bAAV  aAmerican Association of Variable Star Observers 4aThe American association of variable star observerscAAVSO                                                         aU.S.AbAAVSO  a[various pagings.]  aAstronomy  aVariable stars