Estimating
Estimating numbers of terrestrial birds : proceedings of an international symposium held at Asilomar, California, October 26-31, 1980 / editors, C. John Ralph and J. Michael Scott. -- [Spojené státy americké?] : Cooper Ornithological Society, 1981. -- x, 630 stran : ilustrace, grafy, mapy. -- (Studies in avian biology ; no. 6). -- "A publication of the Cooper Ornithological Society". -- ISBN : (Brožováno).
Ralph, C. John. Scott, J. Michael, 1941-. Cooper Ornithological Society
ptáci. živočišné populace. sborníky konferencí
598.2. 591.5:574.3. (062.534). 59