Original photograph: 13 x 18 cm, black & white photo, with "NA" written in front in pencil, caption under photo reads "KP-1125-R2 - Klamath Project - Moss at the top of water about one mile downstream from point of treatment. Picture taken before the chemical had reached that point. R. S. Hopkins, Photo July 12, 1945", from Black Binders Digital reproduction of photograph: KP-1125-R2 - Klamath Project - Moss at the top of water about one mile downstream from point of treatment, Black Binders, Bureau of Reclamation
