Bulletin du Bureau de recherches géologiques et minières.

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Item Link Original Source
Limited (search only)   1963 University of Illinois at Urbana-Champaign
Limited (search only)   1964 University of Illinois at Urbana-Champaign
Limited (search only)   1965 University of Illinois at Urbana-Champaign
Limited (search only)   1966:1-6 University of Illinois at Urbana-Champaign
Limited (search only)   1967:2-6 University of Illinois at Urbana-Champaign