[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 Non-metallic Mineral Resources Development (1st : Laguna : 1978) III.Title. ([S.l. s.n., 1979)
Cover title.
Mimeographed.
Keywords: Mineral resources--Philippines.