TY  - RPRT
TI  - The Portage Lake Volcanics (middle Keweenawan) on Isle Royale, Michigan
AU  - N.K. Huber
PY  - 1973
DO  - 10.3133/pp754c
UR  - https://pubs.usgs.gov/publication/pp754C
ID  - pp754C
ER  -