- The Service (Washington, D.C.?) (79)
- Dept. of Agriculture, Soil Conservation Service (Washington.) (74)
- USDA-SCS (Fort Worth, Tex.) (64)
- Wallace, McHarg, Roberts and Todd (60)
- U.S. Geological Survey (Washington, D.C) (55)
- publisher not identified (39)
- The Survey (Washington, D.C) (33)
- USDA-SCS (Fort Worth, Tex) (31)
- (London) (29)
- Dept. of Agriculture, Soil Conservation Service (Washington) (28)
- Dept. of Agriculture, Soil Conservation Service (Fort Collins, Colo.) (27)
- General Land Office (Washington) (23)
- The Department (St. Paul, Minnesota) (21)
- General Land Office (Washington, D.C) (19)
- The Survey (Washington) (18)
- Sanborn Map Company (New York), 1913 (17)
- U.S. Dept. of Agriculture, Soil Conservation Service (Washington.) (17)
- The Service (Fort Worth, Tex.?) (16)
- American Geographical Society (New York) (15)
- Survey of India (Calcutta) (15)
