Template:Direction 23
- ICZN 1955. Direction 23. Action taken in completion of the Rulings given under the Plenary Powers in Opinion 108 and Opinion 109 validating the generic names Gazella Blainville, 1816, and Hippotragus Sundevall, 1846, respectively (Class Mammalia). Opinions and declarations rendered by the International Commission on Zoological Nomenclature 1C: 201–218. BHL.