by WK $12.00
by WK $13.00
by Aziz Alimul $7.00
by M. Aleq Sander, S.Dr $20.00
by Aziz Alimul $9.00
by Th. Endang Purwoastuti $6.00
by Ir. Susy Fatena Roestiyanti, M.Sc $7.00
by Ir. Suharto $11.00
by Asep Gunawan (editor) $13.00
by AAK $6.00
by - $6.00
by Prof. dr. D. Bachtiar Lubis, dr. Sylvia D. Elvira $7.00