Van Hylckama, T. E. A. The water balance of the earth/ by T. E. A. van Hylckama. - Laboratory of Climatology, Centerton, N.J: Drexel Institute of Technology, 1956. - 116 pages ; 27 cm. - Publications in climatology vol. 9 no.2 . Subjects--Topical Terms: EvapotranspirationPrecipitation (Metereology)