Published in Journal für Ornithologie, in 1913, in volume 61, pages 1-40
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 3-14
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 15-59
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 41-51
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 52-117
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 64-75
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 71-72
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 125-142
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 143-161
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 161-167
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 167-169
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 169-179
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 179-188
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 188-194
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 195-204
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 205-228
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 229-361
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 362-370
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 371-379
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 380-383
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 395-397
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 398-401
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 402-404
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 404-408
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Über die Brutverhältnisse und Eiermafse der in der westlich palärktischen Region lebenden Eulenarten
Published in Journal für Ornithologie, in 1913, in volume 61, pages 409-443
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 444-455
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 455-468
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 469-539
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 546-549
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 549-556
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 556-558
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 558-560
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 561-597
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 597-611
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 612-617
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 618-630
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 630-661
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Published in Journal für Ornithologie, in 1913, in volume 61, pages 661-663
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