by Redaksi Rineka Cipta
$18.00

by Prof. Mr. Dr. Sudargo Gautama
$6.00

by Dr. Albert M. Hutapea, MPH
$11.00

by WK
$12.00

by Prof. Drs. H. A. W. Widjaja
$9.00

by Lanny Soechan
$6.00