Game -
http://www.pro-football-reference.com/boxscores/198412020cle.htm
The scoring summary is incorrect for the 2nd half. The first half is fine. There was no scoring in the 3rd quarter. Cleveland led 10-7 after 3 quarters.
The rest of the scoring should flow as follows:
4th QT
Browns - Mike Pruitt 1 yard rush (Matt Bahr kick) 17-7
Bengals - Jim Breech 22 yard field goal 17-10
Bengals - Anthony Munoz 1 yard pass from Boomer Esiason (Jim Breech kick) 17-17
OT
Bengals - Jim Breech 35 yard field goal 20-17
Source - Gamebook, Cleveland Plains Dealer