During an epidemic of the disease in Hei-ho, northern Manchuria, in 1941, ten per cent of the personnel in the Japanese army were affected.
1959, Sun Ching chih, editor, Economic geography of Northeast China (Liaoning, Kirin, Heilungkiang).[2], Peiping, →OCLC, page 4:
Because of the high latitude, and being located in the east of the mainland, this is the coldest region in the country. To the extreme north is the Hei-ho area that has an average yearly temperature under zero degree centigrade.
1976, C. T. Hu, “China After the Cultural Revolution”, in Christianity and the New China[3], volume I, Ecclesia Publications, →ISBN, →LCCN, →OCLC, page 9:
In respect to population distribution, two points deserve mention. One is the extremely uneven density pattern which can best be illustrated by drawing an imaginary line from Hei-ho in the northwest corner of Heilungkiang province to T'eng-ch'ung in Western Yunnan.
