NHL Expansion: from the Original Six to 1967 NHL ExpansionFrom six teams to 31: History of NHL From six teams to 31: History of NHL NHL Expansion and Relocation, 1942 From six teams to 31: History of NHL The Original Six | Parkway Youth HockeyNHL Expansion and Relocation, 1942 1943-67 NHL - The Expansion Years (1968-1979 From six teams to 31: History of NHL 1967 NHL expansion - WikipediaNHL expansion from Original 6 to SeattleNational Hockey League. “Original Six NHL Expansion Clubs from the Original NHL National Hockey League. The start of History of the National Hockey League Hockey's Original 6 – Greystone Books Ltd.NHL Went Back to the Original Six 1967 NHL expansion - Wikipedia
original 6 nhl expansion teams