Vol. 243, Issue 4, 1945April 01, 1945 EDT
Cephalaspids From the Upper Silurian of Oesel [Estonia], With a Discussion of Cephalaspid Genera
Cephalaspids From the Upper Silurian of Oesel [Estonia], With a Discussion of Cephalaspid Genera
George M. Robertson,
Robertson, G. M. (1945). Cephalaspids from the upper Silurian of Oesel [Estonia], with a discussion of cephalaspid genera. American Journal of Science, 243(4), 169–191. https://doi.org/10.2475/ajs.243.4.169