(1953). Investigation of iron sulfide deposits in South-Central Aitkin County and Carlton County, Minn. / by James Pennington and Vernon C. Davis.
Citace podle Chicago (17th ed.)Investigation of Iron Sulfide Deposits in South-Central Aitkin County and Carlton County, Minn. / by James Pennington and Vernon C. Davis. 1953.
Citace podle MLA (9th ed.)Investigation of Iron Sulfide Deposits in South-Central Aitkin County and Carlton County, Minn. / by James Pennington and Vernon C. Davis. 1953.
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