Ensiklopedia Tanya & jawab Sejarah Dunia

by Ir. Rudiyanto, M.A., Aburiyati, S.Pd., Brian Williams, B. Waluyo, Indri Yuli Astuti, Kalbudiyanto
Published 2005

100 Pengetahuan tentang Serangga & Laba-Laba

by Ir. Rudiyanto, M.A., Steve Parker, B. Waluyo, Ir. Indriyati Wibisono, M.P., Dr. Jim Flegg, Kalbudiyanto
Published 2005