1. Carroll, D. 1962. Rainwater as a chemical agent of geologic process. A review. U.S. Geol. Surv. Water Supply Paper 1535-G, p. G1-G18.
2. The composition of atmospheric precipitation. I Nitrogen compounds;Eriksson;Tellus,1952
3. Factors influencing supply of major ions to inland waters with special reference to the atmosphere;Gorham;Geol. Soc. Amer. Bull.,1961
4. Atmospheric Chemistry. Adv.;Junge;Geophysics,1958