Clark, M. M. (1990). The tonal system of Igbo. Foris.
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Kua rahua te tārua ki te papatopenga
Tohutoru Kātū Chicago (17th ed.)
Clark, Mary Morris. The Tonal System of Igbo. Dordrecht ; Providence, RI: Foris, 1990.
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Kua rahua te tārua ki te papatopenga
Tohutoro MLA (9th ed.)
Clark, Mary Morris. The Tonal System of Igbo. Foris, 1990.
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Kua rahua te tārua ki te papatopenga
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