How many member teams are in the hockey league which Murray Williamson played, coached, and managed within?
United States Hockey League The United States Hockey League (USHL) is the top junior ice hockey league in the United States. The USHL has 17 member teams located in the Midwestern United States, consisting of players who are 20 years of age and younger. The USHL is strictly amateur, allowing former players to compete in NCAA college hockey.
1979–80 NHL season The 1979–80 NHL season was the 63rd season of the National Hockey League. This season saw the addition of four teams from the disbanded World Hockey Association as expansion franchises. The Edmonton Oilers, Winnipeg Jets, New England Whalers (later renamed "Hartford Whalers" at the insistence of the Boston Bruins), and Quebec Nordiques joined the NHL, bringing the total to 21 teams. The other two WHA teams (Birmingham Bulls and Cincinnati Stingers) were paid to disband.