The Crinoidea flexibilia : (with an atlas of A., B., C., and 76 plates) - Springer, Frank, 1848 -1927 (Smithsonian Institution, 1920)

The Crinoidea flexibilia : (with an atlas of A., B., C., and 76 plates) - Springer, Frank, 1848 -1927 (Smithsonian Institution, 1920)

The geological magazine, or, Monthly journal of geology - Woodward, Henry, 1832 -1921 (Cambridge University Press, 1864)

Our country's animals and how to know them. A guide to the mammals, reptiles and amphibians of Great Britain - Gordon, W. J. (Simpkin, Marshall, Hamilton, Kent, 1904)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1846)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1846)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1846)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1879)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1879)