A Brief History of the NHL-WHA Merger - Pure Hockey

The duel for dominance between the established National Hockey League (NHL) and the upstart World Hockey Association (WHA) lasted seven tumultuous seasons

Pro hockey once had two leagues, and that couldn't last

History of the National Hockey League

WHA - What Happened to the NHL's Only Rival League?

WHA-NHL merger 40 years ago happened just in the nick of time

NHL teams OK adding four WHA franchises, including Edmonton Oilers

NHL: The Top 50 Most Skilled Players Since 1967

Defunct NHL Teams - NHL Teams That No Longer Exist - Hockey Topics

NHL teams OK adding four WHA franchises, including Edmonton Oilers

Changing the Game: A History of NHL Expansion eBook

The 1979 NHL – WHA Merger

Question for the old timers: did Wayne Gretzky have hype like

A Brief History of the NHL-WHA Merger - Pure Hockey

The 1979 NHL – WHA Merger

The 1979 NHL – WHA Merger