TY  - BOOK
AU  - Shimer,Hervey Woodburn
AU  - Shrock,Robert Rakes
TI  - Index fossils of North America
PY  - 1972///
CY  - Cambridge, Mass.
PB  - M.I.T. Press
KW  - Paleontology
KW  - North America
KW  - Invertebrates, Fossil
N1  - A new work based on the complete revision and reillustration of Grabau and Shimer's'North American index fossils'
ER  -