Cofnodi Dyfyniadau
Dyfyniad APA
(1899). Map showing location and extent of the forest reserves and national parks in Western United States. U. S. Geological Survey.
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Dyfyniad Arddull Chicago
Map Showing Location and Extent of the Forest Reserves and National Parks in Western United States. U. S. Geological Survey, 1899.
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Dyfyniad MLA
Map Showing Location and Extent of the Forest Reserves and National Parks in Western United States. U. S. Geological Survey, 1899.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.