32 Aves. 
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[1920] 
Swarth, H. S. Revision of the avian 
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Univ. Cal. Publ. Zool. 21 1920 (75- 
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Swarth, H. S. In memoriam : Frank 
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Cal. 22 1920 (129-135) portr. 729 
Swarth, H. S. and W. W. Some 
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Condor Hollywood Cal. 22 1920 (79- 
80). 730 
Swenk, M. H. Bohemian Waxwings 
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Wilson Bull. Oberlin 32 1920 (95-96). 
731 
Symons, R. E. Bird life in the 
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732 
Szielasko, A. Die Gestalten dei 
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Taverner, P. A. The Scoters and 
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34 1920 (41-44) 3 figs. 734 
Taylor, W. P. A new Ptarmigan 
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735 
Terras, H. The story of a Cuckoo’s 
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Terrill, L. Mcl. Fall migrants. 
Canad. Field-Nat. Ottawa 34 1920 
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Tessendorff, F. Die Vogelwelt des 
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738 
Thienemann, Vogel warte Rositten. 
Ornith. Monatsb. Berlin 28 1920 
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Thomson, D. F. The White-fronted 
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Emu Melbourne 20 1920 (94-96) 
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Thysse, J. P. Over vogelgeluiden. 
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Ticehurst, C. B. A contribution to 
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Ticehurst, C. B. and others. Egret 
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London Bull. Brit. Orn. Cl. 40 1920 
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Ticehurst, C. B. Two new races of 
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don Bull. Bt. Orn. Cl. 40 1920 (156- 
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Ticehurst, C. B. Acrocephalus 
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Ticehurst, C. B. Re-marks on the 
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Ticehurst, N. F. The Birds of 
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Tioehurat, N. F. The Common 
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Brit. Bds. London 13 1920 (302-306) 
3 photos. 748 
Ticehurst, N. F. On the former 
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Ticehurst, N. F. On certain other 
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Ticehurst, N. F. An early record of 
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Timmann, O. Veigleichende Unter- 
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Tischler, F. Neophron percnopterus 
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Tischler, F. Acanthis flavirostris 
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47). 754 
