Ordos Plateau (English Wikipedia)

Michael Kohn (1 May 2008). Mongolia. Lonely Planet. pp. 25–. ISBN 978-1-74104-578-9. Retrieved 17 January 2011.
Maenchen-Helfen, Otto (1973). The world of the Huns; studies in their history and culture. Berkeley, University of California Press. p. 371. ISBN 978-0-520-01596-8.
Compare this and this account, both from the 1970s. Bunker, 200, sees them as the same, or rather the Ordos people as a subgroup of the Xiongnu.
Maenchen-Helfen, Otto (1973). The world of the Huns; studies in their history and culture. Berkeley, University of California Press. p. 371. ISBN 978-0-520-01596-8.

books.google.com (Global: 3^rd place; English: 3^rd place)

Leo de Hartog (1996). Russia and the Mongol yoke: th history of the Russian principalities and the Golden Horde,1502. British Academic Press. ISBN 978-1-85043-961-5.
Willem van Ruysbroeck; Giovanni di Piano (abp. of Antivari) (1900). The journey of William of Rubruck to the eastern parts of the world, 1253–5. Printed for the Hakluyt Society. p. 57. ISBN 9780524015322. {{cite book}}: ISBN / Date incompatibility (help)
Silberman, Neil Asher; Bauer, Alexander A., eds. (2012). The Oxford Companion to Archaeology. Oxford University Press. p. 297. ISBN 9780199735785 – via Google Books.
Wu Rukang; John W. Olsen, eds. (2009). Paleoanthropology and Paleolithic Archaeology in the People's Republic of China. Left Coast Press. p. 187. ISBN 9781598744583 – via Google Books.
Beckwith 2009, p. 71 Beckwith, Christopher I. (16 March 2009). Empires of the Silk Road: A History of Central Eurasia from the Bronze Age to the Present. Princeton University Press. ISBN 978-1400829941. Retrieved February 18, 2015.
Compare this and this account, both from the 1970s. Bunker, 200, sees them as the same, or rather the Ordos people as a subgroup of the Xiongnu.

Wang Hai-jing; Chang E; Cai Da-wei; Zhang Quan-chao; Zhou Hui; Zhu Hong (2007). "Mitochondrial DNA analysis of remains from Zhukaigou archaeological site in Inner Mongolia". Journal of Jilin University. Medicine edition. 33 (1): 5–8. ISSN 1671-587X.

Lebedynsky 2007, p. 125 "The Mongoloid types of the Transbaikal area and Central and Eastern Mongolia are strongly contrasted with the Europoid type displayed at the same time by the Scythian nomads occupying Western Mongolia and their predecessors of the Bronze age." Lebedynsky, Yaroslav (2007). Les nomades. Éditions Errance. ISBN 9782877723466.
Lebedynsky 2007, p. 127 Lebedynsky, Yaroslav (2007). Les nomades. Éditions Errance. ISBN 9782877723466.

Wang Hai-jing; Chang E; Cai Da-wei; Zhang Quan-chao; Zhou Hui; Zhu Hong (2007). "Mitochondrial DNA analysis of remains from Zhukaigou archaeological site in Inner Mongolia". Journal of Jilin University. Medicine edition. 33 (1): 5–8. ISSN 1671-587X.