- FondoA1 - Seager Wheeler and Family fonds
- SériesL1 - Letters
- Sub-sériesL1.3 - International
- DossiêLF21 - 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)