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| Basset, André 1952. La Langue Berbère. London/New York/Toronto: Oxford University Press International African Institute; (relevant pages: 12-13) |
| Moravcsik, Edith A. 1978. "Reduplicative Constructions". In: Greenberg, Joseph H., eds., Universals of Human Language, Volume 3: Word Structure, Stanford: Stanford University Press |
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