The mammals of Pennsylvania, with a discussion of the biology of mammals in general, including keys to the orders and families, and with detailed accounts of all species indigenous to Pennsylvania ...
By Samuel Howard Williams ..

APA Citation

Williams, S. Howard. (1928). The mammals of Pennsylvania, with a discussion of the biology of mammals in general, including keys to the orders and families, and with detailed accounts of all species indigenous to Pennsylvania ... Pittsburgh.

MLA Citation

Williams, Samuel Howard. The Mammals of Pennsylvania, With a Discussion of the Biology of Mammals In General, Including Keys to the Orders And Families, And With Detailed Accounts of All Species Indigenous to Pennsylvania ... Pittsburgh, 1928.