Also known as the Cau Ma, the Ma are a group located in the highlands of Lam Dong, Dong Mai, and Thuan Hai provinces in Vietnam. In the census of 1985, the Ma population was placed at 25,436 with the Cho Ro (a subgroup of the Ma) enumerated at 15,022. Two other subgroups are the Cho To and Cho Sop. Some scholars consider the Sop to be a distinct group. Rice is the staple crop, grown in swiddens in the highlands and through irrigation along river banks.
Hickey, Gerald C. (1964). "Ma." In Ethnic Groups of Mainland Southeast Asia, edited by Frank M. LeBar, Gerald C. Hickey, and John K. Musgrave, 153. New Haven: HRAF Press.