OPEN CALL FOR ENTRIES: Gamma Gamma Gallery International Mail Art Exhibition Exhibition: May 4, 2012 – June 30, 2012 Submission Deadline: April 1, 2012 (postmark deadline) Theme: Viva Las Vegas! Gamma Gamma invites artists the world over to contribute work for our Mail Art Exhibition from May 4, 2012 – June 30, 2012. No jury, no fees, no returns. Works submitted will be shown at ouby GammaGamma - Mail Art Calls