by Prof. DR. dr. S.M. Lumbantobing, SpS(K), SpKJ $6.00
by AAK (Aksi Agraris Kanisius) $6.00
by $7.00
by Fachruddin M. Mangunjaya $6.00
by Prof. DR. Made Pidarta $11.00
by Dino Patti Djalal $6.00
by Erich Segal $7.00