Ellsworth Boomer. Interview, 1978., 2827-2B4-S2806, Box: 1 S2802-S2803-S2804-S2805-S2806-S2807-S2808-S2813-S2827-S2828-S2829-S2830-S2869-S3259-S3274. Southwest Minnesota Historical Center. https://smsu.libraryhost.com/repositories/3/resources/550 Accessed July 13, 2026.