Flora and Fauna
- 1981
- Dennstaedtiaceae
- List of genera for "Manual de Flora de Costa Rica" hyperlinked to species lists and specimens.
- 1988
- Bracken Fern Carcinogenicity
- Summary of data reported and evaluation of bracken fern and some of its constituents.
- 1991
- Pteridium aquilinum
- Species information from the U.S. Department of Agriculture/Forest Service's Fire Effects Information System.
