Ardea Official journal of the Netherlands Ornithologists' Union |
van Dijk J., Hofman J.D.D. & de Wilde W. (1970) Notes on sea-birds 31. Sooty Shearwater (Puffinus griseus) near Heligoland. ARDEA 58 (3-4): 264-265 |
geen Nederlandse samenvatting beschikbaar op internet |