by Don WS, Cherry Hadibroto $7.00
by Dixon, S.L. $7.00
by Ir. Mul Muyani Sutedjo $12.00
by Sanker, K. Pal & Dwijesh K. Dutta Majumder $7.00
by Prof. drh. Charles Rangga Tabbu, M.Sc., Ph.D $18.00
by AAK (Aksi Agraris Kanisius) $6.00