Economic plants of Porto Rico,
by O.F. Cook and G.N. Collins.
- Washington, Govt. Print Off., 1903.
- vi, 57-269 p. illus., XIII-LX pl. (incl. front.) 23 cm.
- Smithsonian Institution. United States National Museum. Contributions from the United States National Herbarium. vol. VIII, pt. 2 .