Gandahusada, S. and Nalim, Sustriayu and Sudomo, M. and Usman, Salim and Sukirno, M. and Seregeg, I.G. and Boewono, Damar Tri and Supalin, Supalin and Aminah, Nunik Siti and Suwarto, Suwarto and Widodo, Untung S. (1981) 113. Progress Report September 1981 WHO-VBCRU No.2 (Laporan Penelitian). Project Report. Pusat Penelitian Ekologi Kesehatan, Jakarta. (Unpublished)