What Happened to the Gun Catalog in the 1950 to 1990?

What happened to the gun catalog in the 1950 to 1990? I have been looking for some PDF online, but there are no semi-automatic rifles in them.

Some things to consider… Post WW2 there was a massive amount of military surplus—German initially, other European nations a little later as well as the US surplus—which were plentiful and relatively cheap. Unless you had a reason to buy an American made semiauto for something like issuing to a police department, most of the financial incentive to make a general purpose semiauto was pretty low for a while. After a lot of that dried up, there was a bit of a renaissance of small gun manufacturers that came in with the spread of newer types of manufacturing and technology. So, big manufacturers like Colt, Remington, and Winchester were in competition in some areas with tiny manufacturers which aren’t likely to be in as many catalogs or would be in specialized catalogs. Additionally, most foreign manufacturers didn’t have much of a footprint in the US at the time and may have had their wares only available through importers like Interarms… You’ll find lots of semiauto .22’s and some high end hunting semiautos like the Browning models, but the odds you’ll find a lot of magazines with semiautos until you hit the 1980’s or so is probably low.