TY  - RPRT
TI  - Computer-aided estimates of concentrating-grade iron resources in the Negaunee Iron-formation, Marquette District, Michigan
AU  - William F. Cannon
AU  - Sandra L. Powers
AU  - Nancy A. Wright
PY  - 1978
DO  - 10.3133/pp1045
UR  - https://pubs.usgs.gov/publication/pp1045
ID  - pp1045
ER  -