Three 1907 photographs published in Camera Work are evidence of Stieglitz’s emerging new interest in a modernist aesthetic for photography: Snapshot—From My Window, New York; Snapshot—From My Window, Berlin, and Snapshot—From the New York Central Yards. Stieglitz’s choice of the term snapshot, which was associated with amateur and commercial photography, marked his growing distance from Pictorialist aspirations, although the soft focus, emphasis on atmospheric conditions, and combination of New York and Europe in the selection of snapshots are reminiscent of his earlier artistic photography. 
Frizot, Michael. New History of Photography. Place of publication not identified: Pajerski, 1999. Print p. 331
Greenough, Sarah, and Alfred Stieglitz. Alfred Stieglitz: The Key Set : the Alfred Stieglitz Collection of Photographs. Washington, D.C: National Gallery of Art, 2002. Pl 283
Stieglitz, Alfred, and Dorothy Norman. Alfred Stieglitz. New York: Aperture, 1976. p. 27.
 Lukitsh, Joanne. "Alone on the Sidewalks of New York: Alfred Stieglitz’s Photography, 1892 – 1913."