To the best of my knowledge, there is no link. The publishers SELL the book, and having it available on line for free would negate that. Sorry- I had to buy mine.
Basic reference.
Blue Book of Gun Values
BLue Book of Gun Values
There are several. The Blue Book of Gun Values, Gun Trader's Guide, etc.
Check the Blue Book of Gun Values
Blue Book of Gun Values
Standard Catalog of Firearms, The Blue Book of Gun Values, Guns Digest Guns and Prices, Gun Traders Guide. There's a nice history of this gun with a few pictures at the link to Four Ten UK
Click on the link to your right for Kelly's Blue Book website.
Blue Book of Guns, proofhouse.com
Blue Book of Gun Values might have an answer.
Library, gun show, gun shop, on line
call: 1-800-877-4867 ask for copy of the BLUE BOOK, 28th edition....for gun values cost $39.95 + S&H