I am not sure exactly what this is (I believe it is a years worth of road bike magazine ) they are in a hard cover binding  with minor discoloration on the edges ,always stored in a closet of a smoke free home 
Tons of great images of vintage Motorcycles and How to guides
features all kinds of great categories such as work shop,project bike,Know your bike etc etc
I can not find a date on this but it is obviously early 80s