United Nations Environment Programme 2 Bayate, Drusila Esther E. 1 Cambia, Flordeliza D. 1 Koopaei, Mohammad Taghi Zamanian 1 Montojo, Ulysss M. 1 Oclarit, Ariel Marco T. 1 Perez, Francis 1 Philippines. Bureau of Fisheries and Aquatic Resources 1 San Diego, Maria Lourdes C. 1955- 1 Seminar-Workshop on River Rehabilitation Program for the Manila Bay Region (1991 : Quezon City) 1 Tejano, Ivy C. 1 Virola, Madonna T. 1