United State Department of the Interior geological survey, current records center.
Issued by the Current Records Center, Water Resources Division, U. S. Geological Survey, in Portland, Oregon. "Monthly mean discharge at selected gaging stations and change of storage in certain lakes and reservoirs in the Columbia River basin, 1962-63."
Sing sheet 11 x 22 inch, hole punched. Typed recto and verso. Verso appears twice for readability.
Government documents, Statistical data