| 000 | 006130000a22001930004500 | ||
|---|---|---|---|
| 090 |
_aAR _b02265 |
||
| 245 | 1 | 0 | _aEffect of time of day and time of season on the number of observations and density estimaes of breeding birds |
| 650 | 1 | 4 |
_aAves _992429 |
| 650 | 1 | 4 |
_aPatrones de actividad _994378 |
| 650 | 1 | 4 |
_aEtología _97606 |
| 650 | 1 | 4 |
_aEstaciones _927155 |
| 650 | 1 | 4 |
_aOrnitología _993189 |
| 650 | 1 | 4 |
_aCensos _993673 |
| 651 | 4 |
_dOregon _pEstados Unidos _992749 |
|
| 041 | 0 | _aInglés | |
| 100 | 1 |
_aSkirvin, Aaron A. _995784 |
|
| 942 | _cARTICULO | ||
| 773 | 1 |
_tStudies in Avian Biology _31194 _h6 _q271-274 _d1981 |
|
| 999 |
_c11337 _d11337 |
||