Vol. 239, Issue 8, 1941August 01, 1941 EDT
The Vallejo Formation; New Early Tertiary Red-Beds in Southern Colorado
The Vallejo Formation; New Early Tertiary Red-Beds in Southern Colorado
J. E. Upson,
Upson, J. E. (1941). The Vallejo Formation; new early Tertiary red-beds in southern Colorado. American Journal of Science, 239(8), 577–589. https://doi.org/10.2475/ajs.239.8.577