A critical study of the role of oxygen in the environmental factors of stream self-purification [microform] - Cruz, Conrado P. (Quezon City Photoduplication Service, University of the Philippines Library, 1976)
Microfilmed with 15 other titles.
Thesis (M.S.)--National University, Manila.
Originally published on 1968.
Keywords: Stream self-purification.; Oxygen -- Industrial applications