. . "Photographie astronomique." . . . . . . "An Investigation in stellar photography conducted at the Harvard College observatory... by Edward C. Pickering" . . . "An investigation in stellar photography" . "An investigation in stellar photography conducted at the Harvard College Observatory" . . . . "An investigation in stellar photography : conducted at the Harvard college observatory with the aid of an appropriation from the Bache fund" . "An investigation in stellar photography conducted at the Harvard college observatory with the aid of an appropriation from the Bache fund" . . "An investigation in stellar photography conducted at the Harvard college observatory with the aid of an appropriation from the Bache fund"@en . . . . . "An investigation in stellar photography, conducted at the Harvard college observatory with the aid of an appropriation from the Bache fund" . "An Investigation in Stellar Photography Conducted at the Harvard College Observatory" . . . . .