Použité zdroje:

• Strahler, A.., Strahler, A. (1999): Introducing Physical Geography. Wiley, New York. Kap.4: Atmospheric Moisture and Percipitation, s. 77 - 103
• Netopil, R.. a kol. (1984): Fyzická geografie I.SPN, Praha. Kap.2.3.5:s.65-75
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