Polydactylism in man and the domestic animals, with especial reference to digital variations in swine
by C.W. Prentiss
(Contributions from the Zoölogical Laboratory of the Museum of Comparative Zoölogy at Harvard College, no. 141)
[Zoölogical Laboratory of the Museum of Comparative Zoölogy at Harvard College], 1903
From the Bulletin of the Museum of Comparative Zoology at Harvard College, vol. 40, no. 6
Zoölogical Laboratory of the Museum of Comparative Zoölogy at Harvard College