TY  - BOOK
AU  - Cannon,W.F.
AU  - Powers,Sandra L.
AU  - Wright,Nancy A.
TI  - Computer-aided estimates of concentrating-grade iron resources in the Negaunee Iron-formation, Marquette District, Michigan
T2  - Geological Survey professional paper
U1  - 553.40977496 
PY  - 1978///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Iron ores
KW  - Michigan
KW  - Marquette Co
KW  - Data processing
N1  - Bibliography: p. 21
ER  -