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by Lodewijk Woltjer (Editor), Alastair G. W. Cameron (Editor), Bengt Stromgren (Foreword by)
Contributing Authors Include J. H. Oort, H. J. Habing, H. Van Woerden, And Many Others. Proceedings Of A Conference Held At The Institute For Advanced Study, Princeton, New Jersey, April 10-20, 1961. Benjamin Books In The Planetary And Earth Sciences.