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Whitbeck, R.H.;
1921
Report: 252 p.
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1921
Map: Scale 1 in = 6 miles
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1921
Map: Scale 1 in = 1 mile
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Martin, L.;
1916
Report: 608 p. + map
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Martin, L.;
1932
Map: Scale 1:1,000,000
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Fenneman, N.M.;
1902
Report: 188 p.
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Thwaites, F.T.;
1910
Map: Scale 1 in = 2 miles