by Ir. Bambang Cahyono $7.00
by Ir. Heinz Frick & Pujo L. Setiawan $7.00
by J. W. M. Bakker, SJ $7.00
by Eko Priyo Pratomo, Ubadilah Nugraha $11.00
by Suharso, A.S.P $6.00
by W. Mangoendidjojo $9.00