Monitoring bird populations by point counts /
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| Format: | Texto biblioteca |
|---|---|
| Language: | d |
| Published: |
Albany, Calif. : U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Research Station,
1997
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| Subjects: | BIRD POPULATIONS-CONGRESSES, BIRDS, PROTECTION OF-UNITED STATES-CONGRESSES, BIRDS-ENVIRONMENTAL ASPECTS-UNITED STATES-CONGRESSES, BIRDS-COUNTING-CONGRESSES, Ralph, C. John., Sauer, John R., Droege, Sam., Pacific Southwest Research Station., Symposium on Monitoring Bird Population Trends by Point Counts (1991 : Beltsville, Md.), |
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