The Blue Book of Gun Values is copyrighted, and not available free on line. Your library may have a copy you can check out, but it gets updated each year.
Blue Book of Gun Values is one.
Blue Book of Gun Values would be a place to start
Book Store or Library
Blue Book of Gun Values
Blue Book of Gun Values
Blue Book of Gun Values
No book published on them. Check the Blue Book of Gun Values.
There are several. The Blue Book of Gun Values, Gun Trader's Guide, etc.
Blue Book of Gun Values is one
Blue Book of Gun Values
Blue Book of Gun Values, auctions.
Blue Book of Gun Values