SRST meaning in General ?

The Standing Rock Reservation (Lakota: Íŋyaŋ Woslál Háŋ) lies across the border between North and South Dakota in the United States, and is inhabited by ethnic "Hunkpapa and Sihasapa bands of Lakota Oyate and the Ihunktuwona and Pabaksa bands of the Dakota Oyate," as well as the Hunkpatina Dakota (Lower Yanktonai). The Ihanktonwana Dakota are the Upper Yanktonai, part of the collective of Wiciyena. The sixth-largest Native American reservation in land area in the US, Standing Rock includes all of Sioux County, North Dakota, and all of Corson County, South Dakota, plus slivers of northern Dewey and Ziebach counties in South Dakota, along their northern county lines at Highway 20.

The reservation has a land area of 9,251.2 square kilometers (3,571.9 sq mi), twice the size of the U.S. State of Delaware, and has a population of 8,217 as of the 2010 census. There are 15,568 enrolled members of the tribe. The largest communities on the reservation are Fort Yates, Cannon Ball (both located in Northern Standing Rock) and McLaughlin (located in Southern Standing Rock).