Geological Survey special report.

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Item Link Original Source
Limited (search only)   no.1-7 1963-1972 University of Michigan
Limited (search only)   no.9-14 1975-1979 University of Michigan
Limited (search only)   no.15-21 1978-1981 University of Michigan
Limited (search only)   no.22-31 1981-1983 University of Michigan
Limited (search only)   no.32-38 1983-1986 University of Michigan
Limited (search only)   no.39-42 1987-1989 + Plates University of Michigan
Limited (search only)   no.43-48 1988-1991 + Plates University of Michigan
Limited (search only)   no.50-56 1992-1995 + Plates University of Michigan
Limited (search only)   no.57-60 1994-1998 + Plates University of Michigan