Christensen's Ragtime Review Vol. 1. No. 1 Christensen, Axel editor periodical Chicago Axel Christensen December 1914 monographic adult Ragtime music History and criticism ML1.C695 ragtime Ragtime Ragtime http://lcweb2.loc.gov/diglib/ihas/html/ragtime/ragtime-home.html songamerica Song of America Song of America http://lcweb2.loc.gov/diglib/ihas/html/songofamerica/songofamerica-home.html soa_pop Popular songs of the day soa_progressive Progressive Era to New Era (1900-1929) 200035746 24326 DLC IHAS 060822 loc.natlib.ihas.200035746 Performing Arts Encyclopedia http://www.loc.gov/performingarts