John Zlock, one of the 25 victims of the Venezuelan plane crash yesterday, is a resident of East Railroad Street in Nesquehoning. He has been an employee of the Bethlehem Steel Company at its Iron Mines Company plant in Venezuela for the past 10 years. He is survived by his mother, Mrs. Anna Zlock and two brothers, Milan and Samuel, both of Nesquehoning. He had been in Bethlehem for a meeting with his supervisor and was en route back to his office in Venezuela when the tragic crash occurred.