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2. US Census Bureau . US Census Bureau Geographic Entities and Concepts . https://www.census.gov/content/dam/Census/data/developers/geoareaconcepts.pdf
3. US Census Bureau . ACS PUMS Files: The Basics (2020). https://www.census.gov/content/dam/Census/library/publications/2021/acs/acs_pums_handbook_2021_ch01.pdf
4. US Census Bureau . The American Community Survey (2020). https://www2.census.gov/programs-surveys/acs/methodology/questionnaires/2020/quest20.pdf
5. US National Institute of Standards and Technology (NIST). Collaborative Research Cycle 2023 (2023). https://pages.nist.gov/privacy_collaborative_research_cycle/