Incoming Resources
- National Geographic Society, Washington, DC
- National Geographic, Washington, DC, 2017
- National Geographic, Washington, DC, c2004
- National Geographic, Washington, DC, 2015
- Tumbleweed Press, Distributed by National Book Network, Washington, DC, Lanham, MD, c1993
- National Geographic Society, Washington, DC, c2004
- National Geographic Society, Washington, DC, 2012
- National Geographic, Washington, DC, c2011
- Smithsonian Institution Press, Washington, DC, 1997