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1505
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Superior document: Memoirs of the American Mathematical Society, Volume 85, Number 429
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Superior document: Memoirs of the American Mathematical Society, number 714
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1509
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1510
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1511
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1512
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Superior document: Philia
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1517
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1518
1519
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Superior document: Sonderdruck aus Il territorio veronese in età romana
1520
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Superior document: Ergänzungsheft ... zu Petermann's Geographischen Mittheilungen 19