by AAK (Aksi Agraris Kanisius) $6.00
by Wijanto, dkk $7.00
by Calvin S. Hall & Gradner Lindzey $11.00
by E. Martasudjita, Pr. $3.00
by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $5.00
by $4.00