Other
- Page, William, 1861-1934 26 results
- Kalm, Pehr, 1716-1779 7 results
- Academy of Natural Sciences of Philadelphia 6 results
- Doubleday, H. Arthur (Herbert Arthur), 1867-1941 5 results
- Lawson, John, 1674-1711 5 results
- Rafinesque, C. S. (Constantine Samuel), 1783-1840 5 results
- Bartram, William, 1739-1823 4 results
- Peale, Charles Willson, 1741-1827 4 results
- Pennsylvania 4 results
- Pre-1801 Imprint Collection (Library of Congress) 4 results
- Salzman, L. F. (Louis Francis), 1878- 4 results
- Abbott, Charles C. (Charles Conrad), 1843-1919 3 results
- American Imprint Collection (Library of Congress) 3 results
- Baird, Spencer Fullerton, 1823-1887 3 results
- Barton, Benjamin Smith, 1766-1815 3 results
- Cape May Geographic Society 3 results
- Catesby, Mark, 1683-1749 3 results
- Davis, W. W. H. (William Watts Hart), 1820-1910 3 results
- Hall, James, 1811-1898 3 results
- Josselyn, John, active 1630-1675 3 results
- Page, Wm 3 results
- Peale, Charles Willson, 1741-1827, 3 results
- Smellie, William, 1740-1795 3 results
- Smith, George, 1804-1882 3 results
- Thompson, Zadock, 1796-1856 3 results
- Torrey, John, 1796-1873 3 results
- University of London. Institute of Historical Research 3 results
- Agassiz 2 results
- Bartram, John, 1699-1777 2 results
- Bell, A. 2 results
- Bonnemains, Jacqueline 2 results
- Bour, Roger 2 results
- Buffon, Georges Louis Leclerc, comte de, 1707-1788 2 results
- Chester County Cabinet of Natural Science (West Chester, Pa.) 2 results
- Clemson, Thomas Green, 1807-1888 2 results
- Cope, John Hautenville 2 results
- Delaware Academy of Natural Science 2 results
- Delaware County Institute of Science (Media, Pa.) 2 results
- Ditchfield, P. H. (Peter Hampson), 1854-1930 2 results
- Doubleday, H. Arthur 2 results
- Ely, Warren S. (Warren Smedley), 1855-1936 2 results
- Essex Institute 2 results
- Ewan, Joseph, 1909-1999 2 results
- Formigli, Donald 2 results
- Forster, Johann Reinhold, 1729-1798 2 results
- Gettysburg College Philomathean Society 2 results
- Girard, Charles, 1822-1895 2 results
- Guer, Jean-Antoine, 1713-1764, 2 results
- Haldeman, Samuel Stehman, 1812-1880 2 results
- Historical Society of Pennsylvania 2 results more…