Vol. s5-33, Issue 193, 1937January 01, 1937 EDT
A New North American Graptolite Faunule
A New North American Graptolite Faunule
Rudolf Ruedemann,
Ruedemann, R. (1937). A New North American Graptolite Faunule. American Journal of Science, s5-33(193), 57–62. https://doi.org/10.2475/ajs.s5-33.193.57