Parallel variation in North and Middle American Screech-Owls.
Marshall, J.T. Jr. 1967.
Parallel variation in North and Middle American Screech-Owls.
Monographs of the Western Foundation of Vertebrate Zoology, 1: 1–72.
| Attachment | Size |
|---|---|
 Main article | 1.07 MB |
| Citations & figures | 7.1 MB |
