Ethnic recordings : an introduction / Pekka Gronow -- Commercial ethnic recordings in the United States / Richard K. Spottswood -- Early field recordings of ethnic music / Joseph C. Hickerson -- Irish ethnic recordings and the Irish-American imagination / Mick Moloney -- Lydia Mendoza, an enduring Mexican-American singer / James S. Griffith -- La Alondra de la Frontera / Lydia Mendoza -- The Lark of the Border / Lydia Mendoza -- The Sajewski story : eighty years of Polish music in Chicago / Richard K. Spottswood -- Recorded ethnic music : a guide to resources / Norm Cohen and Paul Wells.