Jurnal : Lingkungan & Development ( Environment & Development) , volume 4- No. 1-4 Desember 1984
Jurnal : Lingkungan & Development ( Environment & Development) , volume 4- No. 1-4 Desember 1984
Jurnal : Lingkungan & Pembangunan ( Environment & Development), Volume 2-No, 3-4 Desember 1982
hal. 415-423