David A. Brose tapes, University of Colorado, Boulder (https://www.colorado.edu/amrc/collections/brose-david);
North Eastern Colorado Council of the Arts Folklorist Collection, Greeley History Museum (https://greeleymuseums.com/wp-content/uploads/2019/11/North-East-Colorado-Council-of-the-Arts-Folklorist-Collection-2007.92.pdf)