Literature
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- Brom, T. G. 1991a. The diagnostic and phylogenetic significance of feather structures. Published thesis, University of Amsterdam.
- Dunning, J. B. Jr. (ed.). 1993. CRC Handbook of Avian Body Masses. CRC Press, Boca Raton, Florida. 371 pp.
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- Shamoun, J. and Y. Yom-Tov [ 1996b. ]. Addition to The Microstructure of Feathers of Israeli Birds. Publ. Tel Aviv University, 79 pp.