Bakich, Michael E. The Cambridge Planetary Handbook. Cambridge University Press, 2000, p. 148, ISBN 0-521-63280-3, see
gnosis.org
Graves, Robert and Patai, Raphael. Hebrew Myths: The Book of Genesis. Novi Eboraci: Doubleday, 1964, pp. 65-69, ISBN 978-1-85754-661-3, ISBN 1-85754-661-X, Publisher: Carcanet Press Ltd. (October 1, 2004); note this publication refers to "Yalqut Reubeni ad. Gen. II. 21; IV. 8.", see
web.archive.org
"The Earth's Second Moon, 1846-present", Samson H. Cheung's page, UC Davis: "The original idea was that the gravitational field of the second moon should account for the then inexplicable minor deviations of the motion of our big Moon. That meant an object at least several miles large -- but if such a large second moon really existed, it would have been seen by the Babylonians."
