| Type |  Book |
| ชื่อเรื่อง | A Habitat-based point-count protocol for terrestrial birds, emphasizing Washington and Oregon / Mark H. Huff ... [et al.] |
| พิมพลักษณ์ | Portland, Or. : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [2000] |
| รูปเล่ม | 39 p. : ill., map |
| หัวเรื่อง | Birds --Counting --Oregon [] |
| | Birds --Counting --Washington (State) [] |
| | Birds --Monitoring --Oregon [] |
| | Birds --Monitoring --Washington (State) [] |