Seven clues to the origin of life : a scientific detective story / A.G. Cairns-Smith. Cairns-Smith, A. G. (Alexander Graham) Life Origin. QH325 .C24 1985 577 C136s Includes index. Cambridge [Cambridgeshire] ; New York : Cambridge University Press, c1985. c1985. 1985 Text xii, 131 p. : http://www.loc.gov/catdir/description/cam031/84023044.html eng