KNOWLTON, F.H., 1889: Fossil wood and lignite of the Potomac Formation. [U.S. Geol. Surv. Bull., 56.]

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KNOWLTON, F.H., 1889

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Fossil wood and lignite of the Potomac Formation. [U.S. Geol. Surv. Bull., 56.] by KNOWLTON, F.H., 1889 listed for sale on Bibliophile Bookbase. Click here for full details and on-line purchase.