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Dyfyniad APA
Plummer Geo. H., Plummer F. G., & Rankine J. H. (1898). Map of Washington showing classification of lands. U. S. Geological Survey.
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Dyfyniad Arddull Chicago
Plummer Geo. H., Plummer F. G., and Rankine J. H. Map of Washington Showing Classification of Lands. U. S. Geological Survey, 1898.
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Dyfyniad MLA
Plummer Geo. H., et al. Map of Washington Showing Classification of Lands. U. S. Geological Survey, 1898.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.