Folded Dimensions: 
Open Dimensions: 
Date Location: Cover - top right corner.
Cover Description: The upper half of the cover features a predominant Gulf logo with title above.  In an illustration below, a female motorist, in a windshield-less auto, chats with a Gulf dealer.  The entire map cover is shown below in the opened position.
Date code:
Ontario Side Features
Quebec Side Features: 
Other: This map is number # 20. 
Note: Thanks to Miles Krisman for sharing this map from his collection.  

31 Gulf Cover 

 31 Gulf Whole Cover