DUFFORD-SCHLEN- GER SUCCASUNNA Mr. and Mrs. Frank W. Dufford of 5 Righter Road, announce the engagement of their daughter, Miss Joann M. Dufford to Robert Evans Schlenger of 3363 Highway 33, Neptune. Mr. Schlenger is the son of Mr. and Mrs. Philip R. Schlenger, 507 Harrison St., Long Branch. Miss Dufford is presently attending Douglass College, New Brunswick. Mr. Schlenger was awarded a bachelor of science degree from Michigan State University. He served three years in the U.S. Navy and is employed as a probation officer for Monmouth County.