U S Department of the Interior
(2)
A. J. Peterka/ U. S. Department of the Interior/ Bureau of Reclamation
(1)
Bureau of Reclamation/ U. S. Department of the Interior
(1)
J. M. West/ U. S. Department of the Interior
(1)
U. S. Department of the Interior (COR)/ U. s. Geological Survey (COR)
(1)