On some invertebrate fossils from the Lykins formation of eastern Colorado /
by George H. Girty.
APA Citation
Girty, G. Herbert. (1912). On some invertebrate fossils from the Lykins formation of eastern Colorado. New York: New York Academy of Sciences.
MLA Citation
Girty, George Herbert, 1869-1939. On Some Invertebrate Fossils From the Lykins Formation of Eastern Colorado. New York: New York Academy of Sciences, 1912.
Warning: These citations may not always be complete (especially for serials).