 Papers including news clippings and published items, programs, recording agreements and photographs of Eleonora and Ethel Olson are available for research at The Minnesota Historical Society.The MHS Library has the 1925, 1929 and 1979 editions of "Yust for Fun" as well as nine 78 rpm discs recorded by the Olson Sisters.A review of the 1979 edition of "Yust for Fun" appeared in the Spring 1980 issue of "Minnesota History" magazine.