Michael Pavlocak Jr., 20, was killed while serving with the U.S. Army in Vietnam, according to word received by his parents, Mr. and Mrs. Michael Pavlocak Sr. of Edison, N.J. The youth was graduated from St. Michael's Parochial School, Lansford, and left the community when his parents moved to New Jersey about six years ago. His mother is the former Theresa Geusic, Lansford.