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Periodical. Klein, Harold P., Norman H. Horowitz, Gilbert V. Levin, Vance I. Oyama, Joshua Lederberg, Alexander Rich, Jerry S. Hubbard, George L. Hobby, Patricia A. Straat, Bonnie J. Berdahl, Glenn C. Carle, Frederick S. Brown, and Richard D. Johnson. "The Viking Biological Investigation: Preliminary Results." Science 194, 4260 (1 October 1976): 99-105. Article. 8 Images.. Science. Lederberg UI. P243