639Primary Group (กลุ่มปฐมภูมิ)TTenEthnic Groups in Mekong River Basin (MRB) active approved Primary Group (กลุ่มปฐมภูมิ)Primary Group (กลุ่มปฐมภูมิ)2021-04-29 14:19:41RT638กลุ่มปฐมภูมิ (Primary group)PT