by Irianto Aritonang $6.00
by Iwan T. Budiarso DVM, M.Sc., Ph.D., APU $11.00
by Sofyan Syafri Harahap $16.00
by Aprinus Salam $7.00
by Drs. Hg. Suseno Triyanto Widodo $6.00
by Tim Agro Kanisius $9.00
