• 

  Mammal Species of the World - Browse: troughtoni

  http://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=13802307

  Mammal Species of the World: Information on troughtoni

• 

  The achromatic telescope, and its various mountings, especially the ... - William Simms - Google Books

  https://books.google.de/books?id=nDIDAAAAQAAJ

  Keine Beschreibung vorhanden.

---

---