Structural conditions in Canadian coal mines.
Norris, Donald Kring, 1924-
Structural conditions in Canadian coal mines. - Ottawa, E. Cloutier, Queen's printer, 1958. - 54 p. illus., maps, diagrs., table.
Part of illustrative matter folded in pocket.
Bibliograhy: p. 10-11.
gs 59000025
Coal mines and mining--Canada.
QE185 / .A43 no. 44
Structural conditions in Canadian coal mines. - Ottawa, E. Cloutier, Queen's printer, 1958. - 54 p. illus., maps, diagrs., table.
Part of illustrative matter folded in pocket.
Bibliograhy: p. 10-11.
gs 59000025
Coal mines and mining--Canada.
QE185 / .A43 no. 44