TY  - BOOK
AU  - Butler,B.S.
AU  - Burbank,W.S.
TI  - The copper deposits of Michigan,
AV  - QE75 .P9 no. 144
PY  - 1929///
CY  - Washington
PB  - Govt. Print. Off.
KW  - Copper ores
KW  - Michigan
KW  - Copper mines and mining
N1  - At head of title: Department of the Interior; Maps and sections (pl. 2-52) in separate portfolio; Bibliography: p. 3-14
ER  -