TY  - RPRT
TI  - Reflexions on Frasnian and Famennian stage boundary decisions as a guide to future deliberations
AU  - W. Ziegler
AU  - Charles Sandberg
PY  - 1995
DO  - 10.1127/nos/33/1995/157
UR  - https://pubs.usgs.gov/publication/70018186
ID  - 70018186
ER  -