Barton's Fragments of the natural history of Pennsylvania. - Barton, Benjamin Smith, 1766-1815.; Salvin, Osbert, 1835-1898.; Willughby society (London [Printed by Taylor and Francis], 1883)
At head of title: The Willughby society.
Reprint of edition of 1799, including facsimile of original t.-p.
No more published; pt. 1 treats of birds, with data regarding vegetation and miscellaneous observations.
Keywords: Natural history -- Pennsylvania; Birds -- Pennsylvania; Phenology