1.
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Freiburg im Breisgau : Herdersche Verlagshandlung, 1901.
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2.
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Philadelphia : Hubbard Brothers, [1872] ©1872
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3.
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London : Macmillan and Company, 1879.
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4.
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London : T. Fisher Unwin, 1899.
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5.
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London : Richard Bentley, 1846.
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6.
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New York : Dix, Edwards & Company, 1857.
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7.
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New York : Charles Scribner's Sons, 1899.
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8.
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New York : Harper & Brothers, publishers, 1858.
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9.
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New York : The Century Company, 1898.
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10.
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Philadelphia : Hubbard Brothers, [1875]
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