Biology and control of water lettuce (Pistia stratiotes L.) [microform]. - Bua-ngam, Thawil 1941- (Quezon City Photoduplication Service, University of the Philippines Library, 1978)
Microfilmed with 12 other titles.
Thesis (Ph.D.)--University of the Philippines, Los Banos.
Originally published in [College, Laguna] 1975.
Keywords: Water lettuce