Modèle:Walker1925
De Odonates du Monde
Walker E.M. 1925 - The North American dragonflies of the genus Somatochlora. - University of Toronto Studies, Biological Series n°26 : 202 pp. + 35 pl.
Walker E.M. 1925 - The North American dragonflies of the genus Somatochlora. - University of Toronto Studies, Biological Series n°26 : 202 pp. + 35 pl.
