TY  - RPRT
TI  - Preliminary map of iron provinces in the conterminous United States
AU  - Harry Klemic
AU  - Edwin Wilson Tooker
PY  - 1979
DO  - 10.3133/ofr79576h
UR  - https://pubs.usgs.gov/publication/ofr79576H
ID  - ofr79576H
ER  -