TY  - GEN
AU  - Gregory, Richard D.
AU  - Gibbons, David W.
AU  - Donald, Paul E.
TI  - Bird census and survey techniques
T2  - Techniques in ecology & conservation series
KW  - Biologia
KW  - 6000 - Ciências Biológicas
UR  - https://catalogo.ispa.pt/opac/biblioteca/localizacao_doc/b.htm
ER  -