TY  - JOUR
A1  - Grabau, A. W.
A1  - Shimer, H. W.
DO  - 10.5962/bhl.title.52120
JO  - A. G. Seiler & Company, New York
C1  - 2: 909 pp.
TI  - North American index fossils, invertebrates
UR  - https://www.biodiversitylibrary.org/page/36182786
VL  - 909
PY  - 1910
Y2  - 2026-09-07
ER  -