1 Japan International Cooperation Agency (JICA).; Nippon Koei Co. Ltd.; Nikko Exploration and Development Co. Ltd. 2002. The study on groundwater development in the rural provinces of the central highlands. [Vietnam]. Vol. 2/2, Gia Lai Province. Final report - main report. Tokyo, Japan: Japan International Cooperation Agency (JICA); Tokyo, Japan: Nippon Koei Co. Ltd.; Tokyo, Japan: Nikko Exploration and Development Co. Ltd. 271p.
2 Japan International Cooperation Agency (JICA).; Nippon Koei Co. Ltd.; Nikko Exploration and Development Co. Ltd. 2002. The study on groundwater development in the rural provinces of the central highlands. [Vietnam]. Vol. 3/3, Gia Lai Province. Final report - supporting report. Tokyo, Japan: Japan International Cooperation Agency (JICA); Tokyo, Japan: Nippon Koei Co. Ltd.; Tokyo, Japan: Nikko Exploration and Development Co. Ltd. 358p.