by Robert Chambers $6.00
by Drs. Agus M. Hardjana, M.Sc., Ed $6.00
by Dra. Kumara Poespo $12.00
by Ir. Abbas Siregar Djarijah $6.00
by Bustamin & M. Isa H.A. Salam $6.00
by Ir. Setijo Pitojo $7.00