[Proceedings of a] seminar-workshop on Non-metallic mineral resources development, Nayong Kalikasan, Caliraya, Laguna, Nov. 8-9, 1978 - Philippine Council for Agricultural Resources Research; Seminar-Workshop on On-metallic Mineral Resources Development (1st : Laguna : 1978). ([S.l. s.n., 1979)
Cover title.
Mimeographed.
Keywords: Nonmetallic minerals -- Philippines -- Congresses; Mines and mineral reosurces -- Philippines -- Congresses