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Erpenius over werkwoorden.
by
A. J. Drewes
E. J. Brill, 1969
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Inscriptions de l'Éthiopie antique
by
A. J. Drewes
E.J. Brill, 1962
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Classical Arabic in central Ethiopia
by
A. J. Drewes
Brill, 1976
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