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Author/Creator
- Geological Survey (U.S.)8
- Burton, William C. (William Chapin), 1952-2
- Dennen, William H.2
- Massachusetts. Department of Public Works2
- Wones, David R.2
- Earhart, Robert L.1
- Middendorf, Mark A.1
- Missouri. Division of Geology and Land Survey1
- Mudge, Melville R., 1921-20091
- Ratcliffe, Nicholas M. (Nicholas Morley), 1938-1