Erethizon dorsatum.

Mammalian Species 29; 6 Seiten, 2 Abb.
Hrsg.: American Society of Mammalogists

PDF: https://academic.oup.com/mspecies/article-abstract/doi/10.2307/3504036/2600610?redirectedFrom=fulltext

https://www.mammalsociety.org/common-porcupine [Kurzfassung)

woods-biblio