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.
There are several. The Blue Book of Gun Values, Gun Trader's Guide, etc.
Blue Book of Gun Values
2008 Standard Catalog of Firearms. 18th edition
No book published on them. Check the Blue Book of Gun Values.
Book Store or Library
Blue Book of Gun Values
Blue Book of Gun Values
Blue Book of Gun Values
Blue Book of Gun Values would be a place to start
Blue Book of Gun Values
Blue Book of Gun Values is one