1.
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Second addition to the knowledge of the Batrachia and Reptilia of Costa Pica Cope, Edward Drinker
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2.
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Non-Deteriorating Choice BOSSERT, Walter - SPRUMONT, Yves
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3.
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What Is a Commody? Two Axiomatic Anwers SPRUMONT, Yves
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4.
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Ranking Sets of Objects BARBERA, Salvador - BOSSERT, Walter - PATTANAIK, Prasanta K.
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