The National Gem Collection /
Jeffrey E. Post ; with photographs by Chip Clark.

APA Citation

National Museum of Natural History (U.S.)., Clark, C., Post, J. Edward. (1997). The National Gem Collection. [Washington, D.C.]: National Museum of Natural History, Smithsonian Institution .

MLA Citation

National Museum of Natural History (U.S.), Chip Clark, and Jeffrey Edward Post. The National Gem Collection. [Washington, D.C.]: National Museum of Natural History, Smithsonian Institution , 1997.