Walcott, C.D., 1925, Cambrian Geology and paleontology V, No. 3; Cambrian and Ozarkian trilobites: Smithsonian Miscellaneous Collections, v. 75, p. 59-146. Authors Walcott, C.D. Publication Date 1925 Citation Smithsonian Miscellaneous Collections, v. 75, p. 59-146. AzGeoBib RefNum 10751