http://en.wikipedia.org/wiki/Mongkol_Borei_District
Mongkol Borei District (Khmer: ស្រុកមង្គលបុរី) is a district (srok) in the south of Banteay Meanchey Province, in north-western Cambodia. The district capital is Mongkol Borei town located around 8 kilometres south of the provincial capital of Sisophon by road. Mongkol Borei District is the southern-most district of Banteay Meanchey. The district shares a border with Battambang Province to the south. The main railway line from Phnom Penh to Poipet on the border with Thailand runs through the district from north to south.[2]
The district is easily accessed by road from Sisophon (8 km) Battambang (city) (60 km) and Siem Reap (city) (110 km). Mongkol Borei District is one of the smallest districts in Banteay Meanchey province by land area and only Serei Saophoan District is smaller. However, it has the largest district population in the province due to its central location and transport infrastructure. National Highway 5 which begins in Phnom Penh and ends at Poipet and the National railway bisect the district in parallel running from north to south. National road 160 begins near the centre of the district and runs south west into Pailin.[3]

http://d.hatena.ne.jp/mimizawa/20101008/1286517429
バンティアイ=ミアンチェイ州
トモー=プオク郡
スヴァーイ=チェーク郡
プノム=スロック郡
オー=チラウ郡
セレイ=サオポアン郡
モンコール=ボレイ郡
プレア=ネート=プレア郡
マーライ郡