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The ACRL Information Literacy Framework (2015) mentions the information ecosystem. Both material and digital sources are part of that ecosystem. The materiality of archival sources complements the increasingly digital nature of regular library collections (Samuelson & Coker, 2014). American Archives Month serves as a good reminder of this fact.
Association of College & Research Libraries (2015). Framework for information literacy for higher education. Retrieved from http://www.ala.org/acrl/standards/ilframework
Samuelson, T., & Coker, C. (2014). Mind the gap: Integrating special collections teaching. Portal: Libraries and the Academy, 14(1), 51-66.