The Archive of American Folk Song of the Library of Congress contains songs collected in 33 states of the Union and certain parts of the West Indies, The Bahamas, and Haiti. As Curator and Assistant in Charge of the Folk Song Collection John and Alan Lomax supervised and worked with many other folklorists, musicologists, and composers, amateur and professional, all over the country, amassing more than ten thousand records of vocal and instrumental music on aluminum and acetate discs along with many pages of written documentation.