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2. Remarks on the races of Dicrurus adsimilis;Bates;Bull. Brit. Ornith. Club,1933
3. Chapin , J. P. 1921 Description of four new birds from the Belgian Congo Amer. Mus. Novitates 7 1 9
4. Chapin , J. P. 1932 Fourteen new birds from tropical Africa Amer. Mus. Novitates 570 12 13