1. Alvarez, L. W., Alvarez, W., Asaro, E, and Michel, H. V.: 1980, ‘Extraterrestrial Cause for the Cretaceous-Tertiary Extinction’, Science
208, 1095–1108.
2. Baldwin, R. B.: 1949, The Face of the Moon, University of Chicago Press, Chicago, 239 pp.
3. Beard, D. P.: 1925, ‘Coral Origin of the Lunar Craters’, Pop. Astron.
33,74–75.
4. Campbell, W. W.: 1920, ‘Notes on the Problem of the Origin of the Lunar Craters’, Publ. Astron. Soc. Pac.
32, 126–138.
5. Dana, J. D.: 1846, ‘On the Volcanoes of the Moon’, Am. J. Sci.
2, 335–353.