31. 1972 OBERS projections economic activity in United States by economic area, water resources division and subarea, and State, historical and projected, 1929-2020; prepared by Commerce Department, Social and Economic Statistics Administration, Bureau of Economic Analysis, Regional Economics Division and Agriculture Department, Economic Research Service, Natural Resources Economics Division. v. 5. States. Bookmark Corporate/Agency Authors: Water Resources Council Publisher: Water Resources Council Date: Sept. 1972 SuDoc number: Y 3.W 29:2 Ob 2/972/v.1-5