ZACHARIAS, V. J.; OELKE, Hans; BHARDWAJ, A. K. Occurrence of the Willow Warbler Phylloscopus Trochilus (Linne) in Thekkady, Kerala, South India. Indian Forester, [S. l.], v. 123, n. 10, p. 975–975, 1997. DOI: 10.36808/if/1997/v123i10/6126. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/6126. Acesso em: 10 jul. 2025.