Studies.

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Item Link Original Source
Limited (search only)   v.1 University of California
Limited (search only)   v.1 University of California
Limited (search only)   v.1 1937-1939 University of Michigan
Limited (search only)   v.2:1 University of California
Limited (search only)   v.2 no. 1 University of California
Limited (search only)   v.2 no.1 1940 University of Michigan
Limited (search only)   v.2 no.2 p.219-238 University of California
Limited (search only)   v.2 no. 4 p.617-674 University of California
Limited (search only)   v.2 no.4 p.675-679 University of California