The American Humor Studies Association maintains two publications–a semi-annual newsletter, To Wit (April 1, October 31), and the journal, Studies in American Humor (semi-annually, Spring and Fall). These publications are included in the membership to the AHSA. Back issues of Studies in American Humor can be found using the Ebscohost service.
Please see this link for recent issues of To Wit.
Follow the link below for the journal webpage.