Van Oler books & textbook
Game Assignments: Right People, Right Place, Right Time- The Right Way
Jeffrey Stern David Uyl Matt Moore Bob Masucci Van Oler David Uyl Matt Bowen
The National Association of Sports Officials (NASO) and Referee Enterprises, Inc. /2013-10-25 Perfect Paperback / 150 Pages
isbn-10: 1582082383 / isbn-13: 9781582082387
