- FondsA1 - Seager Wheeler and Family fonds
- SeriesL1 - Letters
- SubseriesL1.3 - International
- FileLF21 - Farm Management and Field Studies and Demonstrations
- Item2021-L-107 - Farm-Management Field Studies and Demonstrations, South Dakota (Nov 18)
- Item2021-L-129 - Farm-Management Field Studies and Demonstrations, South Dakota (Mar 20)