The "Thirteen Polkas" music book published by Belmont Music Company in 1940 is a vintage collection of dance music focusing on polka, folk music, and dance genre. This song book provides a glimpse into the musical landscape of the time, offering a variety of polka tunes for enthusiasts to enjoy and dance along to. Perfect for collectors or those interested in exploring traditional music, this vintage gem from the United States is a valuable addition to any music library.