關於「Iowa State Quarter」標籤，搜尋引擎有相關的訊息討論：

Iowa State Quarter - U.S. Mintwww.usmint.gov › coins › coin-medal-programs › iowaIowa State Quarter Dollar | Mintage Worldwww.mintageworld.com › media › detail › 9135-iowa-stat...2004 Iowa Quarters Worth Money - YouTubewww.youtube.com › watchUS Coin 2004 Iowa State/Park Quarter