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1par Cohen Ralph
Routledge and Kegan Paul 1964Livre -
2par Cohen Ralph L.
American Mathematical Society copyright 1981Livre -
3Livre
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4Routledge 1989Livre
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5par Conference on algebraic topology in honor of R. James Milgram
American Mathematical Society copyright 2001Livre -
6par International conference on algebraic topology
Springer-Verlag cop. 1989Livre