TY  - RPRT
TI  - Ordovician of the Sauk megasequence in the Ozark region of northern Arkansas and parts of Missouri and adjacent states
AU  - Raymond L. Ethington
AU  - John E. Repetski
AU  - James R. Derby
PY  - 2012
DO  - 10.1306/13331496m983496
UR  - https://pubs.usgs.gov/publication/70045422
ID  - 70045422
ER  -