Területi statisztikai zsebkönyv.

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Item Link Original Source
Limited (search only)   1965 University of Michigan
Limited (search only)   1968 University of Michigan
Limited (search only)   1969 University of Michigan
Limited (search only)   1970 University of Illinois at Urbana-Champaign
Limited (search only)   1971 Indiana University
Limited (search only)   1972 Indiana University