Music Highways and Byways: This book is edited by Osbourne McConathy, John W. Beattie and Russell V. Morgan c. 1936 by Silver Burdett Company, USA. “The volume contains much original material which is covered by the copyright of the book and must not be used without special permission.” This is most interesting book with stories about the different countries; their dances, culture and lyrics with translations of folk songs that are almost forgotten. "La Perla" is a Puerto Rican folk song that I have never heard of.. There is a section "Trips Abroad" which includes RCAVictor recordings of folks songs from Sweden, Ukraine (Leo Bezruchko), Poland, Czechoslovakia, Yugoslavia (then), Italy, China and Japan. What a treasure!