1. Equisetum ramosissimum as a British plant   Publication: [S.l. : s.n.], 1948. . [5] p. : ill. , Reprint of: Watsonia, vol. 1, pt. 3, 1948, p. 149-153. Availability: No items available: Actions: Add to cart No cover image available No cover image available
2. The phytogeography of the pteridophytes of the Departmento del Choco, Colombia   Publication: Washington D.C. : National Geographic Society, 1978. . [7] p. : maps. , Reprinted from: National Geographic Society Research Reports, 1969 Projects, p. 381-387. Availability: No items available: Actions: Add to cart No cover image available No cover image available
3. A preliminary chechlist of Jamaican pteridophytes   Publication: Kingston : Institute of Jamaica, 1953. . 89 p., 3 leaves of plates : ill., maps Availability: No items available: Actions: Add to cart No cover image available No cover image available
4. The pteridophytes of Suriname : an enumeration with keys of the ferns and fernallies   Publication: Utrecht : Natuurwetenschappelijke Studiekring Voor Suriname en de Nederlandse Antillen, 1978. . 197 p. Availability: No items available: Actions: Add to cart No cover image available No cover image available