William Roxburgh's fern types - Morton, Conrad Vernon, 1905-1972. (U.S. Govt. Print. Off., Washington Smithsonian Institution Press; for sale by the Supt. of Docs., 1974)
'Bulletin of the United States National Museum.'
Includes index.
2
Keywords: Roxburgh, William, 1751 -- 1815; Ferns -- Type Specimens; Botany -- Type specimens