Sentence:  To find out , we traveled throughout that part of Laos still nominally controlled , in the daytime at least , by the Royal Lao Army : from Attopeu , the City of Buffalo Dung in the southeast , to Muong Sing , the City of Lions in the northwest , close to Communist China ( map , <WSD>page</WSD> 250 ) . 
Meaning of the word marked with <WSD> tags:  one side of one leaf (of a book or magazine or newspaper or letter etc.) or the written or pictorial matter it contains