Harald von Freiherr Loudon (Also published as Harald von Freiherr Loudon, where "Freiherr" is a title of nobility; 1876–1959), Baltic German ornithologist.
Publications
- Sarudny, N.A. & Loudon, H. 1905. Vorläufige Beschreibung zweier ornithologischeii Neuheiten aus West-Persien. Ornithologische Monatsberichte 13: 76. Reference page.
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