i think the second one is correct. "of" means " 's " so you cannot use it twice
December 20, 2007
the second one, because "president's" implies ownership, while "presidents" is just plural.
December 15, 2007
"A luncheon honoring the past presidents of the association." is correct, since it is referring to plural past presidents. The apostrophe, on the other hand, is used to indicate the possessive form of a noun.
December 12, 2007
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