Author

Douglas R. Hartman

2 books found

Cover of The Hell Creek Formation and the Cretaceous-Tertiary boundary in the northern Great Plains

The Hell Creek Formation and the Cretaceous-Tertiary boundary in the northern Great Plains

Joseph Herbert Hartman, Kirk R. Johnson, Douglas J. Nichols · First published 2002

Cover of Nebraska's militia

Nebraska's militia

Douglas R. Hartman · First published 1994