APA Citation

Kummel, B. History of the earth an introduction to historical geology. Freemn and Co..

Chicago Style Citation

Kummel, Bernhard. History of the Earth an Introduction to Historical Geology. Freemn and Co..

MLA Citation

Kummel, Bernhard. History of the Earth an Introduction to Historical Geology. Freemn and Co..

Warning: These citations may not always be 100% accurate.