INCOMPLETE INFORMATION was received for the obituary of Keith L. Mavrich of Canonsburg, published Monday. Also surviving are three uncles and four aunts. Incorrect information was provided for the obituary of Rebecca D. Rutan, published Sunday. The last name of her brother, retired Cmdr. Frank G. Duncan Jr., was wrong. Copyright ©1998 Observer Publishing Co.Last updated Tuesday, August 25, 1998CORRECTIONS