Iowa geology.

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Item Link Original Source
Limited (search only)   no.4-15(1979-1990) University of Illinois at Urbana-Champaign
Limited (search only)   no.6(1981) State University System of Florida
Limited (search only)   no.7(1982) State University System of Florida
Limited (search only)   no.8(1983) State University System of Florida
Limited (search only)   v. 10-16 1985-1991 Purdue University
Limited (search only)   NO11-18 1986-1993 The Ohio State University
Limited (search only)   no.13(1988) State University System of Florida
Limited (search only)   no.16-24 (1991-99) University of Minnesota
Limited (search only)   v. 17-24 1992-1999 Purdue University
Limited (search only)   NO19-24 1994-1999 The Ohio State University
Limited (search only)   no.21 1996 Cornell University
Limited (search only)   no.22 1997 Cornell University
Limited (search only)   no.23 1998 Cornell University
Limited (search only)   no.24 1999 Cornell University
Limited (search only)   no.24 1999 Pennsylvania State University
Limited (search only)   no.25 2000 Cornell University
Limited (search only)   no.26 2001 Cornell University