2 1 10 Nurhajati Hakim Additional Author M. Yusuf Nyakpa Additional Author Lubis, A. M. Additional Author Sutopo Ghani Nugroho Additional Author M. Rusdi Saul Additional Author M. Amin Diha Additional Author Go Ban Hong Additional Author Bailey, H. H. Additional Author mixed material Lampung Universitas Lampung 1986 NULL Lubis, A. M. Additional Author mixed material Lampung Universitas Lampung 1984 NULL