TY  - RPRT
TI  - Physiography and surficial geology of the copper-nickel study region, northeastern Minnesota
AU  - P. G. Olcott
AU  - D. I. Siegel
PY  - 1978
DO  - 10.3133/wri7851
UR  - https://pubs.usgs.gov/publication/wri7851
ID  - wri7851
ER  -