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  1. By: Royal Society for the Protection of Birds
    Publication info: London, Royal Society for the Protection of Birds,
    Holding Institution: Multiple institutions
    Subjects: 59.82.06(42)  Birds  Great Britain  Periodicals  
  2. Publication info: London, Harrison and Sons, [1921]-[1969]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.82.06(42)  Birds  Breeding  Eggs  Periodicals