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Find out more about Oklahoma Sierra Club's activities across the state and in your very own community! We have OKSC Groups in Oklahoma City, Norman, and Tulsa, as well as OKSC Student Sections at both of our major state universities, OU and OSU.
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Oklahoma Sierra Club: P.O. Box 60644, Oklahoma City, OK 73146-0644
Tulsa address: PO Box 52183, Tulsa, OK 74152