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- [41] GEOLOGIC ENVIRONMENT OF COKING COAL OF WESTERN NORTH-AMERICA WITH EMPHASIS ON CANADIAN SCENE CANADIAN MINING AND METALLURGICAL BULLETIN, 1971, 64 (714): : 20 - &
- [42] GEOLOGIC ENVIRONMENT OF COKING COAL OF WESTERN NORTH-AMERICA WITH EMPHASIS ON CANADIAN SCENE CANADIAN MINING AND METALLURGICAL BULLETIN, 1972, 65 (723): : 45 - &
- [46] REGIONAL CHEMICAL CHARACTERISTICS OF LAKES IN NORTH-AMERICA .2. EASTERN UNITED-STATES WATER AIR AND SOIL POLLUTION, 1986, 31 (3-4): : 577 - 591