TY  - BOOK
AU  - Gray,Francis W.
TI  - The coal-fields and coal industry of eastern Canada,: a general survey and description,
T2  - Canada. Dept. of mines. Mines branch. Bulletin
AV  - TN26 .A35 no. 14
PY  - 1917///
CY  - Ottawa
PB  - Government printing bureau
KW  - Coal mines and mining
KW  - Canada
N1  - Bibliography: p. 55-60
ER  -