Vol. s5-16, Issue 92, 1928August 01, 1928 EDT
Fossil Zones in the Colorado Shale of Alberta
Fossil Zones in the Colorado Shale of Alberta
Percival S. Warren, R. L. Rutherford,
Warren, P. S., & Rutherford, R. L. (1928). Fossil zones in the Colorado shale of Alberta. American Journal of Science, s5-16(92), 129–136. https://doi.org/10.2475/ajs.s5-16.92.129