- FondsA1 - Seager Wheeler and Family fonds
- Série organiqueL1 - Letters
- Sous-série organiqueL1.3 - International
- DossierLF21 - Farm Management and Field Studies and Demonstrations
- Pièce2021-L-107 - Farm-Management Field Studies and Demonstrations, South Dakota (Nov 18)
- Pièce2021-L-129 - Farm-Management Field Studies and Demonstrations, South Dakota (Mar 20)