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Darkness at night : a riddle of the universe

MLA

Harrison, Edward Robert. Darkness at night : a riddle of the universe. Cambridge, Mass. : Harvard University Press, 1987.

APA

Harrison, E. (1987). Darkness at night : a riddle of the universe. Cambridge, Mass. : Harvard University Press.

Chicago

Harrison, Edward Robert. Darkness at night : a riddle of the universe. Cambridge, Mass. : Harvard University Press, 1987.

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