Incoming Resources
- World Wildlife Fund guide to extinct species of modern times, [editor, Walton Beacham]
- The quiet extinction, stories of North America's rare and threatened plants, Kara Rogers
- Vanishing flora, endangered plants around the world, text & illustrations by Dugald Stermer
- The Official World Wildlife Fund guide to endangered species of North America, [managing editor, David W. Lowe, editors, John R. Matthews, Charles J. Moseley]