1) Colorado earthquake data and interpretations, 1867 to 1985

Author
Kirkham, Robert M
Series
Bulletin volume 46
Publisher
Colorado Geological Survey, Department of Natural Resources
Pub. Date
1985.
Language
English

2) Colorado earthquake information, 1867-1996

Author
Kirkham, Robert M
Series
Bulletin volume 52
Publisher
Colorado Geological Survey, Department of Natural Resources
Pub. Date
[2000]
Language
English