TY  - RPRT
TI  - The Ibexian Series (Lower Ordovician), a replacement for "Canadian Series" in North American chronostratigraphy
AU  - R. J. Ross
AU  - L. F. Hintze
AU  - Raymond L. Ethington
AU  - J.F. Miller
AU  - M.E. Taylor
AU  - J.E. Repetski
AU  - J.E. Sprinkle
AU  - T.E. Guensburg
PY  - 1993
DO  - 10.3133/ofr93598
UR  - https://pubs.usgs.gov/publication/ofr93598
ID  - ofr93598
ER  -