. Der Gesang der Vögel : seine anatomischen und biologischen Grundlagen. Birdsongs; Birds -- Anatomy. a X! à â â ci aj M X E c ^ , 1- o Co O >. > tâ1 W bH Ort !3 hfl . 3 X! ^ fe :cö -O ^ ?< 1- s <u (U Co 1- O 3 - bX) . fcn ;iD i- <u ^â ^ (U J3 0) w. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hacker, Valentin, 1864-1927. Jena : Verlag von Gustav Fischer

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirdsan, bookyear1900