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Kolyma: The Arctic Death Camps.

London: Macmillan, 1978. ---.

The Great Terror: A Reassessment.

New York: Oxford University Press, 1990.

Cooper, Henry S. F.

A House in Space.

New York: Holt, Rinehart and Winston, 1978.

Cortright, Edgar M.

Exploring Space with a Camera.

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