研究19世纪以后的蒙古史,最感困难的原因之一是史料过多。19世纪以后的蒙古史史料,其种类之多,是以前时期不能相比的。比如,档案、报纸、杂志、日记、回忆录、声响,影像等史料,是19世纪以前所没有的,就是有,到今天也所剩无几了。除了蒙古人民共和国、中国、苏联以外,保存蒙古的各种资料、文献、文物最多的可能就是日本了。尤其就内蒙古而言,由于日本在帝国主义诸列强中的特殊利害关系,日本人比其它外国人在内蒙古有 One of the most troubling reasons for studying Mongolian history after the 19th century is the excessive amount of historical data. Nineteenth Century after the Mongolian historical data, as many kinds, can not be compared in the previous period. For example, archives, newspapers, magazines, diaries, memoir, sound, video and other historical materials, which were not available before the 19th century, are there and to this day there is not much left. Apart from the People’s Republic of China, China and the Soviet Union, Japan may have the largest number of documents, documents and cultural relics in Mongolia. In the case of Inner Mongolia in particular, because of the special interests of Japan in the ranks of imperialist powers, the Japanese are more likely than other foreigners in Inner Mongolia