by Ir. L. Widarto & FX. Sudarto C. Ph $5.00
by Edward Goldsmith $25.00
by V. Lestari $12.00
by Bambang Waluyo, S.H. $9.00
by Ahmad Mahmud Himayah $5.00
by Abdul Tawwab Yusuf $5.00
by Dr. Yekti Maunati $9.00
by Muhibin Syah $11.00
by $7.00
by $20.00
