All of these out of date price guides will have information to offer although you can forget about using the information provided on the knife values. But the relevant information about the knives, blades, patterns and the cutlery companies can be useful.
My two favorites of the newer editions are the American Premium Guide to Knives & Razors by Jim Sargent. This one has had two editions issued and Jim is in the process of revising for the 3rd edition. It has pictures of Case patterns you will not see anywhere else. My other newer favorite is the last edition of the Pocket Knife traders Guide By Buzz Parker and Ed Henley. It has some good material on newer Case knives. By newer I mean 70s, 80s,90s.

If your looking for something to help you price your collection of older Case knives, Tony Foster puts out a price list on a monthly basis It's knife values are not carved in stone but we all use it as a guide.

All three of these publications are available from the authors. I would suggest trying to purchase a copy from someone in the knife business. You may have cause to speak to one of these gentlemen one day and they will remember selling you a book quicker than Amazon will.