And several references can be provided upon request! A great book to add to any serious collector's portfolio OR simply a good investment to put in the closet as a diversified investment! Thanks for looking and be sure to add me to your favorites list. Add a map to your own listings.The item "Action Comics 276 CGC 3.5 OWithW Silver Age DC Comic IGKC L@@K" is in sale since Saturday, February 22, 2020. This item is in the category "Collectibles\Comics\Silver Age (1956-69)\Superhero\Superman". The seller is "investmentgradekeycomics" and is located in Marietta, Georgia. This item can be shipped worldwide.