@Book{BDG201890788393, title = "A guide to modern British Ornithology", author = "Irwin, Raymond", publisher = "Ashbourne : J.H. Henstock \& Son : The Avian Press", editor = "J.H. Henstock \& Son : The Avian Press", series = "(British bird books)", URL = "http://biblioteca.galiciana.gal/es/consulta/registro.do?id=483711", year = "1947", }