Não informado. (1912). Skillings mining review. Skillings Mining Review.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Skillings Mining Review. Duluth, Minn: Skillings Mining Review, 1912.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Skillings Mining Review. Skillings Mining Review, 1912.
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