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Message * Articles On F-type Main Sequence Stars, including Polaris, Procyon, Alpha Herculis, Upsilon Andromedae, W Ursae Majoris, Alpha Librae, Tau Boötis, Alpha Ursae Majoris, Hd 169830, Mu Draconis, Alpha Comae Berenices, Gamma Virginis - 1243250992 - 9781243250995