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61by Gordon, Samuel George, 1897-“...Special publication (Academy of Natural Sciences of Philadelphia) ;...”
Published 1922
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62by Stewart, Ralph Bentley, 1901-“...Special publication (Academy of Natural Sciences of Philadelphia) ;...”
Published 1930
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63Published 1985“...Special publication (Academy of Natural Sciences of Philadelphia) ;...”
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64Published 1977“...Special publication (Academy of Natural Sciences of Philadelphia) ;...”
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65by Richards, Horace Gardiner, 1906-1984“...Special publication (Academy of Natural Sciences of Philadelphia) ;...”
Published 1965
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66by Goldschmidt, Victor, 1853-1933“...Special publication (Academy of Natural Sciences of Philadelphia) ;...”
Published 1928
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67by Snyder, Martin Avery“...Special publication (Academy of Natural Sciences of Philadelphia) ;...”
Published 2003
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68by Leidy, Joseph, 1823-1891“...Journal of the Academy of Natural Sciences of Philadelphia ;...”
Published 1974
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69Published 1976Table of Contents: “...The Academy of Natural Sciences of Philadelphia, 1812-1850 /...”
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70by Boyer, Charles S. (Charles Sumner), 1856-1928“...Academy of Natural Sciences of Philadelphia. Proceedings, 78-79. Supplement...”
Published 1927
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