00797cam a22002531 4500 gs 59000027 DLC 20260227111407.0 720306s1958 xx 000 0 eng gs 59000027 (OCoLC)256080 DLC OAkU OCoLC DLC premarc QE185 .A4 no. 18 TN490.C65 R6 Copy 2. Rowe, Robert B. Niobium (columbium) deposits of Canada. Ottawa, E. Cloutier, Queen's printer, 1958. vii, 108 p. illus., maps (part fold. col.) diagrs., tables. Geological Survey of Canada Economic geology series no. 18 Part of illustrative matter in pocket, Bibliography: p. 99-103. Niobium. 29308 29308