REDACTIE (1934) Back Finds of foreign ringed birds, 2. LIMOSA 7 (4): 182-184.

Hooded Crow Corvus cornix = Corvus corne cornix Common Starling Sturnus vulgaris Barn Owl Tyto alba Grey Heron Ardea cinerea European Golden Plover Pluvialis apricaria Black-headed Gull Chroicocephalus ridibundus = Larus ridibundus Common Gull Larus canus canus

[free pdf] [dutch summary]