1
by Heilprin, Angelo 1853-1907
Published 1887
“...Transactions of the Wagner Free Institute of Science of Philadelphia ; 1...”Published 1887
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2
Published 1887
“...Transactions of the Wagner Free Institute of Science of Philadelphia...”
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3
by Heilprin, Angelo
Published 1887
“...Transactions of the Wagner Free Institute of Science of Philadelphia...”Published 1887
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4
Published 1889
“...Transactions of the Wagner Free Institute of Science of Philadelphia...”
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5
Published 1890
“...Transactions of the Wagner Free Institute of Science of Philadelphia...”
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6
Published 1890
“...Transactions of the Wagner Free Institute of Science of Philadelphia...”
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7
by Dall, William Healey
Published 1890
“...Transactions of the Wagner Free Institute of Science of Philadelphia...”Published 1890
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8
Published 1892
“...Transactions of the Wagner Free Institute of Science of Philadelphia...”
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9
Published 1896
“...Transactions of the Wagner Free Institute of Science of Philadelphia...”
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10
by Leidy, Joseph 1823-1891
Published 1896
“...Transactions of the Wagner Free Institute of Science of Philadelphia...”Published 1896
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11
Published 1898
“...Transactions of the Wagner Free Institute of Science of Philadelphia...”
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12
by Allen, Harry
Published 1898
“...Transactions of the Wagner Free Institute of Science of Philadelphia...”Published 1898
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13
Published 1900
“...Transactions of the Wagner Free Institute of Science of Philadelphia...”
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14
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15
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