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report 1860
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report 1883
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report 1898
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report 1906
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report 1918
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report 1969
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report 1976
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report 1985
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Jons, Otto P. (author), Fuller, G.D. (author), Letourneau, R.M. (author) report 1987
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Webster, W.C. (author), Dalzell, J.F. (author), Barr, R.A. (author) report 1988
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Lawson, Richard B. (author) report 1995
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Letellier, Paul (author) report 1996
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report 1997
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Halverson, Loern (author), Tuttle, Mark (author) report 2000