TY  - BOOK
AU  - Winchell,Alexander Newton
ED  - American Institute of Mining, Metallurgical, and Petroleum Engineers.
ED  - Engineers' Club of Northern Minnesota.
ED  - Duluth Engineers' Club.
TI  - Handbook of mining in the Lake Superior region
AV  - TN24.M5 A6
PY  - 1920///]
CY  - [Minneapolis
PB  - Press of Byron & Learned company
KW  - Mines and mineral resources
KW  - Superior, Lake
KW  - Iron mines and mining
KW  - Copper mines and mining
ER  -