Gretzky scoring 50 goals in 39 games in 1981-82 is one of his most famous records
It's the quickest ever to 50 goals from the start of the season. But it's actually not the quickest 50 goals.
In 1983-84, he actually scored 50 goals in 34 games.
This happened from the December 14, 1983 9-4 win against the Rangers (game 32) to the 12-2 win against the Canucks on March 11, 1984 (game 65).
You can check the log on Hockeyreference:
www.hockey-reference.com
Game 32: 3
Game 33: 1
Game 34: 2
Game 35: 3
Game 36: 1
Game 37: 1
Game 38: 0
Game 39: 0
Game 40: 1
Game 41: 4
Game 42: 3
Game 43: 2
Game 44: 1
Game 45: 0
Game 46: 0
Game 47: 3
Game 48: 2
Game 49: 0
Game 50: 2
Game 51: 1
Game 52: 0
Game 53: 2
Game 54: 0
Game 55: 2
Game 56: 4
Game 57: 4
Game 58: 0
Game 59: 2
Game 60: 1
Game 61: 0
Game 62: 2
Game 63: 0
Game 64: 1
Game 65: 2
Total: 50 goals in 34 games
It's the quickest ever to 50 goals from the start of the season. But it's actually not the quickest 50 goals.
In 1983-84, he actually scored 50 goals in 34 games.
This happened from the December 14, 1983 9-4 win against the Rangers (game 32) to the 12-2 win against the Canucks on March 11, 1984 (game 65).
You can check the log on Hockeyreference:

Wayne Gretzky 1983-84 Game Log | Hockey-Reference.com
Gamelogs for Wayne Gretzky for 1983-84

Game 32: 3
Game 33: 1
Game 34: 2
Game 35: 3
Game 36: 1
Game 37: 1
Game 38: 0
Game 39: 0
Game 40: 1
Game 41: 4
Game 42: 3
Game 43: 2
Game 44: 1
Game 45: 0
Game 46: 0
Game 47: 3
Game 48: 2
Game 49: 0
Game 50: 2
Game 51: 1
Game 52: 0
Game 53: 2
Game 54: 0
Game 55: 2
Game 56: 4
Game 57: 4
Game 58: 0
Game 59: 2
Game 60: 1
Game 61: 0
Game 62: 2
Game 63: 0
Game 64: 1
Game 65: 2
Total: 50 goals in 34 games