Villa, Alex
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1991: Wildfowl Special Issue No. 1 - SECTION ONE: DISTRIBUTION AND STATUS
Demography of Black-necked Swans Cygnus melancoryphus in three Chilean wetland areas
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1991: Wildfowl Special Issue No. 1 - SECTION FIVE: HABITATS, FOOD AND FEEDING
Reproductive biology of Black-necked Swans Cygnus melancoryphus at three Chilean wetland areas and feeding ecology at Rio Cruces
Abstract PDF