Bites and Stings of Venomous Animals: Identification and Treatment,
Baltimore: Johns Hopkins University Press - Upcoming, Spring 2000.
Costa Rica's National Parks and Preserves: A Visitor's Guide Seattle: Mountaineers Books (Second Edition) 1999.
Costa Rica's National Parks and Preserves: A Visitor's Guide Seattle: Mountaineers Books 1993.
Selected Articles
"Rattlesnake Roundups: Uncontrolled Wildlife Exploitation and the Rites of
Spring,"Journal of Applied Animal Welfare Science,Volume 3, Number 2, April
2000.