SHIMER, HERVEY WOODBURN.
Index fossils of North America; a new work based on the complete revision and reillustration of Grabau and Shimer's North American index fossils, by Hervey W. Shimer & Robert R. Shrock.
SHIMER, HERVEY WOODBURN. Index fossils of North America; a new work based on the complete revision and reillustration of Grabau and Shimer's North American index fossils, by Hervey W. Shimer & Robert R. Shrock. © 8May44; A180623. Robert R. Shrock (A); 12Oct71; R514782.
Robert R. Shrock|A