Christie's - London Courtesy of Christies, London (Sale: 7434 - Photographs, Lot: 109 - Nov 13, 2007)
Signed and dated in ink on recto; signed, dated and numbered '1/6' in ink on backing board.
German-born Blum, a contributing photographer to the now iconic Marlboro Man advertising campaign, shot this image near Yellowstone National Park in 1992.
