by Dixon, S.L. $7.00
by Iwan T. Budiarso DVM, M.Sc., Ph.D., APU $11.00
by dr. A.A.A.A. Kusumawardhani $5.00
by Nursalam $7.00
by Aziz Alimul $9.00
by Prof. DR. dr. S.M. Lumbantobing, SpS(K), SpKJ $5.00