1
by Avcin, Matthew J.
Washington : U.S. Govt. Print. Off., 1979
Washington : U.S. Govt. Print. Off., 1979
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Book
2
3
by Phillips, Tom Lee, 1931-
Urbana : Illinois State Geological Survey, 1976
Other Authors:
“...Avcin, Matthew J....”Urbana : Illinois State Geological Survey, 1976
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Book
4
by Hatch, Joseph R.
Iowa City, Iowa : Iowa Geological Survey, 1984
Other Authors:
“...Avcin, Matthew J....”Iowa City, Iowa : Iowa Geological Survey, 1984
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Book