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- Minnesota Geological Survey552
- Not given54
- Minnesota Department of Natural Resources, Division of Waters37
- LPS Natural Resource District16
- Conservation and Survey Division15
- UNL Libraries Image & Multimedia Collections12
- [s.n.]6
- Philadelphia Inquirer5
- Bergen County Board of Chosen Freeholders1
- Byram Township Environmental Commission1
- E. Eugene Oross Associates1
- George H. Cook, N.J. State Geologist1
- Livingston Manor Corporation1
- New Jersey. Dept. of Environmental Protection.1
- Robert F. Diffendal, Jr.1
- Sanborn Map & Publishing Company1
- The Water Center1
- US Geological Survey1