Northwestern University football players are voting today on whether to form a union, but the results may not be known for weeks. An initial ruling by the National Labor Relations Board in February set the stage for today's vote by saying that football players are essentially school employees and are entitled to unionize. The university appealed that ruling and the NLRB has agreed to review the decision, ordering the vote totals to remain secret until the appeal is concluded. Seventy-six players are eligible to vote, though they are not required to do so. A majority of those voting would have to agree before the College Players Athletic Association could become the bargaining agent for players.