by Ir. Abbas Siregar Djarijah & Ir. Harsono Puspowardoyo $6.00
by A.M. Mangunhardjana, SJ $6.00
by Dr. Alex I. Suwandi, Pr. $4.00
by AAK (Aksi Agraris Kanisius) $6.00
by Emanuel Gerrit Singgih, Ph.D. $7.00
by Joos van Vugt $7.00
by Muhammad Noor $7.00
by Suharso, A.S.P $9.00
by - $16.00
by Leden Marpaung, S.H. $11.00
by - $9.00
by Prof. Dr. Soegijanto Padmo $6.00