Incoming Resources
- The quiet extinction, stories of North America's rare and threatened plants, Kara Rogers
- The Official World Wildlife Fund guide to endangered species of North America, [managing editor, David W. Lowe, editors, John R. Matthews, Charles J. Moseley]
- Beacham's guide to the endangered species of North America, edited by Walton Beacham, Frank V. Castronova, Suzanne Sessine