TY  - RPRT
TI  - Notes on the geology and iron cores of the Cuyuna district, Minnesota
AU  - E.C. Harder
AU  - A.W. Johnston
PY  - 1918
DO  - 10.3133/b660a
UR  - https://pubs.usgs.gov/publication/b660A
ID  - b660A
ER  -