books.google.ca - For 25 years prior to expansion in 1967, big-league pro hockey consisted of only six teams and about 120 players. A document called the "C-Form," signed by young, often poor, Canadian boys, could bind a player to one franchise for life, thus insuring a team"s future. Intense rivalries brewed, as the...http://books.google.ca/books/about/Hockey_s_Glory_Days.html?id=8mL21xbWrXcC&utm_source=gb-gplus-shareHockey's Glory Days
