by Sarkawi B. Husein $5.77
by Prijono Tjiptoherijanto, S.E, M.A, Ph.D $7.00
by Lester R. Brown $21.00
by Ng Philipus $9.00
by Sumitro Djojohadikusumah $31.00
by Septiawan Santana K. $12.00