Ross, H. (2016). Improbable planet: How earth became humanity's home. Baker Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoss, Hugh. Improbable Planet: How Earth Became Humanity's Home. Grand Rapids, Michigan: Baker Books, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRoss, Hugh. Improbable Planet: How Earth Became Humanity's Home. Baker Books, 2016.
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