by Prof. dr. Arjatmo Tjokronegoro, dr. Sumedi Sudarsono
$7.00

by Iwan Yusi
$10.00

by T. Tarmizi, Lepi
$6.00

by Gregory F. A. Pierce
$8.00

by Christine A. Adams
$6.00

by dr. Clifford Rose & dr. Paul Davies
$6.00