Search U.S. government technical reports digitized or harvested by TRAIL.

Keyword Search

Microscopic and petrographic studies of certain American coals,

Published Year

• 1930-1939 (1)

Subject

• Coal--United States (1)
• Microscopes (1) *
• Microscopy (1)

Author

• Sprunk, George C., (1)
• Thiessen, Reinhardt, (1) *

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

Search developed and maintained by the University of Washington Libraries
Copyright 2010