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(Piciformes)
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[1]
[2]
- ↑
Short, Lester L. (1991). Forshaw, Joseph (ed.). Encyclopaedia of Animals: Birds. London: Merehurst Press. pp. 152?157.
ISBN 1-85391-186-0
.
- ↑
Gorman, Gerard (2004): Woodpeckers of Europe: A Study of the European Picidae. Bruce Coleman, UK.
ISBN 1-872842-05-4
.