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Papers & proceedings of the Western Postal History SeminarConference Proceeding BookОпубликовано 1992
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The trans-Mississippi West;papers read at a conference held at the University of Colorado June 18-June 21 1929Conference Proceeding BookОпубликовано 1930
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The fur trade revisitedselected papers of the sixth North American Fur Trade Conference Mackinac Island Michigan 1991Conference Proceeding BookОпубликовано 1994