Erin Belka and Keith C. Sendziak were united in marriage at 2 p.m. Friday by Ryan Belka, the bride's brother, in the Glen Iris Inn, Letchworth State Park, prior to a reception. The bride is the daughter of Glen and Keen Belka of Banning, Calif., and the bridegroom is the son of Robert Sendziak of Lancaster and Donna Stanton of Plympton, Mass. A graduate of University of California at Davis and Hastings Law School, San Francisco, the bride is an attorney for Central Valley Injured Workers Legal Clinic. The bridegroom, a graduate of Paul Smith's College and Cornell University, is attending Vermont Law School. After a trip to California, the couple will live in Modesto, Calif.