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Studwell, W.E.: Library of Congress Subject Heading period subdivisions for the history of Canadian regions, provinces, and territories : some proposed additions (1987)
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Studwell, W.E.: Subject suggestions 1 : some concerns relating to geographic areas (1988)
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Studwell, W.E.: Library of Congress Subject Heading period subdivisions for the history of the individual states of the United States : some proposed additions (1987)
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Studwell, W.E.: Library of Congress Subject Heading period subdivisions for Southeast Asia : some proposed additions (1982)
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