A revision of the forms of the ladder-backed woodpecker (Dryobates scalaris [Wagler])

• 1 January 1911
• journal article
• Published by Smithsonian Institution in Proceedings of the United States National Museum
• Vol. 41  (1847) , 139-159
• https://doi.org/10.5479/si.00963801.41-1847.139

Abstract

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• ARTICLE