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Ronald Singer, Bruce G. Gladfelter, John J. Wymer ; with contributions by Sheridan G.E. Bowman ... [et al.]
University of Chicago Press 1993
Available at 9 libraries
[by] Bruce G. Gladfelter
Dept. of Geography, University of Chicago] 1971 Research paper / the University of Chicago, Department of Geography no. 130
Available at 11 libraries
Karl W. Butzer and Carl L. Hansen ; with contributions by Egbert G. Leigh Jr., Madeleine van Campo and Bruce G. Gladfelter
University of Wisconsin Press 1968
Available at 10 libraries