- ColecciónBUC - Businesses Collection
- SériesTEC - Telephone Companies
- ItemIHM.2020.0187a - Indian Head Area Telephone Exchange Map (1975)
- ItemIHM.2020.0188 - Sunny South Rural Telephone Company Box
- ItemIHM.2020.0189 - Sunny South Rural Telephone Company Minute Book
- ItemIHM.2020.0190 - Albina Rural Telephone Company (Sintaluta) Minute Book
- ItemIHM.2020.0191 - Albina Rural Telephone Company (Sintaluta) Cash Book 1918 - 1971
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