1. ‘Not too wild a dream’: NASA and the quest for life in the solar system;Launius;Quest,1998
2. Germs in space: Joshua Lederberg, exobiology, and the public imagination, 1958–19;Wolfe;Isis,2002
3. Other Worlds than Ours: The Plurality of Worlds Studied under the Light of Recent Scientific Researches;Proctor,1870
4. The development of Venus studies;Cruikshank,1983
5. Schiaparelli’s researches on the rotation of Venus and Mercury;Dreyer;Mon. Not. Roy. Astro. Soc.,1891