Porcupine (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Porcupine" in Simple English language version.

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books.google.com

Morrisson, Philip; Morrisson, Phyllis (March 2001). "Wonders: The Needy Porcupine". Scientific American. Retrieved 2007-06-29.

Olson, Rich; Andrea M. Lewis (May 1999). Porcupine Ecology and Damage Management Techniques for Rural Homeowners (PDF). University of Wyoming, Cooperative Extension Service. p. 4. Archived from the original (PDF) on 2007-12-03. Retrieved 2007-06-29.

"Reference.com". Archived from the original on 2017-03-10.
Olson, Rich; Andrea M. Lewis (May 1999). Porcupine Ecology and Damage Management Techniques for Rural Homeowners (PDF). University of Wyoming, Cooperative Extension Service. p. 4. Archived from the original (PDF) on 2007-12-03. Retrieved 2007-06-29.