Biodiversity Heritage Library

BHL has entered a new chapter. Learn more.

Browse by:

Sort By:

The birds of El Paso County, Colorado

View Metadata

By: Aiken, Charles Edward Howard, - Colorado College.

Publication info: Colorado Springs, Published by the authority of the Board of Trustees of Colorado College, 1914

Holding Institution: Cornell University Library

Subjects: Birds Colorado El Paso County
Twisted crystals of pyrite and smoky quartz

View Metadata

By: Frondel, Clifford,

Publication info: New York City, The American Museum of Natural History, [1936]

Holding Institution: American Museum of Natural History Library

Subjects: 54.8,5 Chester County Colorado Crystal growth Crystallography Dislocations in crystals El Paso County Minerals Pennsylvania Pyrites Quartz