1. The problems of artificial control of rainfall on the Globe, I, General effects of ice nuclei in clouds;Bergeron;Tellus,1949
2. Experimental meteorology;Schaefer;J. Appl. Math. Phys. (ZAMP), Basel Switzerland,1950
3. An appraisal of cloud seeding as a means of increasing precipitation;Houghton;Bull. Amer. Met. Soc.,1951
4. Artificial rain, a review of the subject to the close of 1889;Ward;Amer. Met. J.,1892
5. Report of the agent of the Department for making experiments in the production of rainfall;U. S. Department Of Agriculture;Senate Executive Document,1892