VI.—Observations on the classification of birds
| Image |  |
|---|---|
| Description | |
| Author/s |
author: Robert Wilson Shufeldt |
| Publication date | August 1899 |
| Language | English |
| Country of origin | |
| Wikipedia link | |
| Copyright status |
public domain in United States. |
| Missing/wrong data? | Edit Wikidata item |