00756cam a22002411 4500 gs 59000025 DLC 20260227111407.0 720222s1958 xx 000 0 eng gs 59000025 (OCoLC)245699 DLC OAkU DLC premarc QE185 .A43 no. 44 Norris, Donald Kring, 1924- Structural conditions in Canadian coal mines. Ottawa, E. Cloutier, Queen's printer, 1958. 54 p. illus., maps, diagrs., table. Geological Survey of Canada. Bulletin 44 Part of illustrative matter folded in pocket. Bibliograhy: p. 10-11. Coal mines and mining Canada. 29307 29307