TY  - SER
AU  - Blanco, Guillermo
AU  - Yorio, Pablo Martín
AU  - Bertellotti, Nestor Marcelo
TI  - Effects of research activity on hatching sucess in a Colony of South American Terns
KW  - AVES
N1  - En: Waterbirds, vol. 22, no. 1 (1999)
ER  -