Robbins, W. G. (1997). Landscapes of promise: The Oregon story, 1800-1940. University of Washington Press.
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Chicago-čujuhus (17. p.)
Robbins, William G. Landscapes of Promise: The Oregon Story, 1800-1940. Seattle: University of Washington Press, 1997.
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MLA-čujuhus (9. p.)
Robbins, William G. Landscapes of Promise: The Oregon Story, 1800-1940. University of Washington Press, 1997.
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