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Author/Creator
- Geological Survey (U.S.)8
- Ratcliffe, Nicholas M. (Nicholas Morley), 1938-8
- Armstrong, Thomas R.2
- Vermont Geological Survey2
- Burton, William C. (William Chapin), 1952-1
- Massachusetts. Department of Public Works1
- New York (State). Department of Environmental Conservation1
- Potter, Donald B., 1923-1
- Rockland County (N.Y.)1
- Stanley, Rolfe S.1
- Yager, Richard M.1