Güldemann, Tom and Edward D. Elderkin (forthcoming) 'On external genealogical relationships of the Khoe family.نسخة محفوظة 2009-03-25 على موقع واي باك مشين.' In Brenzinger, Matthias and Christa König (eds.), Khoisan Languages and Linguistics: the Riezlern Symposium 2003. Quellen zur Khoisan-Forschung 17. Köln: Rüdiger Köppe.
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Güldemann, Tom and Edward D. Elderkin (forthcoming) 'On external genealogical relationships of the Khoe family.نسخة محفوظة 2009-03-25 على موقع واي باك مشين.' In Brenzinger, Matthias and Christa König (eds.), Khoisan Languages and Linguistics: the Riezlern Symposium 2003. Quellen zur Khoisan-Forschung 17. Köln: Rüdiger Köppe.