1. Description of a new mollusk from the red sandstone, near Pottsville, Pa Author(s): Lea, Isaac, 1792-1886 Publication: Philadelphia : Merrihew and Thompson, printers, 1855 Subject(s): Mollusca -- classificationFossilsPhiladelphia
2. Extracts from the Proceedings of the Academy of Natural Sciences of Philadelphia, of papers Author(s): Lea, Isaac, 1792-1886 Publication: [Philadelphia? : s.n., 1856?] Subject(s): Alismatales -- classificationFossilsGeologic SedimentsMollusca -- classification
