Statistical abstract.

Description

Viewability

Item Link Original Source
Limited (search only)   Indiana University
Limited (search only)   Indiana University
Limited (search only)   1972/73 University of Illinois at Urbana-Champaign
Limited (search only)   1978 University of Texas at Austin
Limited (search only)   1979 University of Texas at Austin
Limited (search only)   1980 University of Minnesota
Limited (search only)   1984,1986 University of Texas at Austin
Limited (search only)   1985 University of Michigan
Limited (search only)   1992 University of Minnesota
Limited (search only)   1997 University of Texas at Austin