Proceedings of the first symposium on hydrology [held] April 8, 1969, Dr. Paulino J. Garcia Memeorial Hall ... Manila. - Symposium on Hydrology Manila) 1969 (Manila s.n.], 1969)
"Under the auspices of the National Science Development Board, UNESCO National Commission of the Philippines and the Philippine National Committee for the International Hydrological Decade".
"Organized as a contribution to the Philippines program."
Keywords: Hydrology -- Philippines -- Congresses