American democracy in theory and practice: national, state and local government / Robert K. Carr ...[et al]
Holt, Rinehart and Winston, 1961
 Buku Teks
Mimien Harianti, author
Enzyme activity in relation to total k, ca, mg, fe, cu and zn in the oil palm rhizosphere of riau’S peatlands, Indonesia
Seameo Biotrop, 2018
 Artikel Jurnal
Fujita Koichi, author
Structure of production, processing, and marketing of para rubber in mon state, Myanmar: Its past, present, and prospects
Southeast Asian Studies, Kyoto University, 2021
 Artikel Jurnal
Mustakim, author
Performance comparison between support vector regression and artificial neural network for prediction of oil palm production
Faculty of Science and Technology, 1Information System Department UIN Sultan Syarif Kasim Riau, 2016
 Artikel Jurnal
Minyak kelapa sawit: suatu tinjauan produksi, pemasaran dan prospek = Palm oil: a review on its production, marketing and prospect
Bank Bumi Daya
Bank Bumi Daya, 1988
 Buku Teks