Sturdevant, G.E., 1926, Ancient ferns: Grand Canyon Nature Notes, v. 1, p. 3. Authors Sturdevant, G.E. Publication Date 1926 Citation Grand Canyon Nature Notes, v. 1, p. 3. State AZ Province CP TR County CN MO Placenames Marble Canyon Keywords Fossil Plant More Keywords Fossil Plant, AzGeoBib RefNum 9863