//-->
Pläne und Register
Ulbrich, Karl, (1972)
Los recursos hidraulicos y su aprovechamiento en America latina : 2: Venezuela
(1961)
Field Methods and equipment used in hydrology and hydrometeorology : (Transactions of the Interregional Seminar on Field Methods and Equipment used in Hydrology and Hydrometeorology held at Bangkok, Thailand, from 27 November to 11 December 1961)
(1962)