by P.E. Lorenz $5.00
by dr. Muchlis Ramli, dr. Rainy U., dr. Sonar S.P $6.00
by Dr. Pradana Soewondo, SpPD-KEMD $7.00
by Soedarmo, Sumarmo Poorwo $6.00
by Syaifuddin $12.00
by Jonni M.S, M.Sitorus, Nelly K $7.00