Lea, S. (1962). The U. S. softwood lumber situation in a Canadian-American perspective. Canadian-American Committee.
Chicago-viite (17. p.)Lea, Sperry. The U. S. Softwood Lumber Situation in a Canadian-American Perspective. [Washington]: Canadian-American Committee, 1962.
MLA-viite (8. p.)Lea, Sperry. The U. S. Softwood Lumber Situation in a Canadian-American Perspective. Canadian-American Committee, 1962.
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