Batak Angkola  
Indigenous Group Batak Angkola (Also known as: Orang Angkola, Anakola, Angkola)
Location Indonesia, Island of Sumatra, Sumatera Utara Province, near Sipirok
Estimated Population 750,000 (1991, SIL International)
Environment Rainforest Highlands
Lifestyle Sedentary
Subsistence Agriculture / Fishing / Textiles / Handicraft Sales
Level of Assimilation Assimilated
Language Family Batak Angkola
Classification: Austronesian, Malayo-Polynesian, Sundic, Sumatra, Batak, Southern
Alternate names: Orang Angkola, Anakola, Angkola 
Dialects: Close to Mandailing Batak, but distinct sociolinguistically. Closely related to Toba Batak.
Website URLs Royal Netherlands Institute of Southeast Asian and Caribbean Studies (KITLV)
Wikipedia: Batak (Angkola, as ethnic subset of Batak group)
1993 Library of Congress Report (Batak cultural overview, statistics)
Ethnologue
Batak Religion
NGOs World Rainforest Movement
Down To Earth
The Corner House