Retrieved 25 August 2013. ↑ Sepharial, A. The Science of Foreknowledge: Being a Compendium of Astrological Research, Philosophy, and Practice in the East and West.; Kessinger Publishing (reprint), 1997, pp. 39–50; ISBN 1-56459-717-2 , see ↑ "On a photographic search for a satellite of the Moon", Popular Astronomy, 1903 ↑ Pickering, W.H (1907), "The Place of Origin of the Moon — The Volcani Problems", Popular Astronomy, 15: 274–287, Bibcode:1907PA.....15..274P ↑ "Armed Forces Seeks "Steppingstone to Stars"", Los Angeles Times, 1954-03-04 ↑ "1 or 2 Artificial Satellites Circling Earth, Says Expert", San Francisco Examiner, p. 14, 1954-05-14 ↑ Stimson, Thomas E., Jr (October 1955), "He Spies on Satellites", Popular Mechanics, p. 106 ↑ Los Angeles Times, 1957-09-04 Missing or empty |title= (help) ↑ "Forming the lunar farside highlands by accretion of a companion moon".