TY  - RPRT
TI  - Ordovician, Silurian, and Devonian biostratigraphy of east-central Alaska
AU  - Michael Churkin
AU  - Earl E. Brabb
PY  - 1965
DO  - 10.1306/a6633526-16c0-11d7-8645000102c1865d
UR  - https://pubs.usgs.gov/publication/70197612
ID  - 70197612
ER  -