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TO ALEXANDER DONIPHAN WALLACE on his 68th birthday on the 21st of August, 1973.
The first author was supported by N.S.F. Grant GP 33946.
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Carruth, J.H., Clark, C.E. H Coextensions in the category of compact semigroups. Semigroup Forum 7, 164–179 (1974). https://doi.org/10.1007/BF02315972
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DOI: https://doi.org/10.1007/BF02315972