Notes on Pluto graphite deposit / George J. Bancroft. 1942 Sep. 10.

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Notes on Pluto graphite deposit / George J. Bancroft. 1942 Sep. 10.

[3] leaves ; 28 cm. + 1 certificate of assay, 4 photographs, and 1 map (21 x 29 cm.)

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Bancroft, George R.

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