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Holland, Clement Joseph (1949). Catalog of Free and Inexpensive Teaching Aids for High Schools. Consumer Education Study, National Association of Secondary-School Principals, Department of the National Education Association. Archived from the original on November 16, 2022. Retrieved November 16, 2022.
Berg, Clara (October 30, 2021). "Bishop, John Doyle (1913-1980)". historylink.org. Archived from the original on November 15, 2022. Retrieved November 15, 2022.
Jones, Jeanne Lang (December 28, 2008). "Unico signs its top-floor tenant". Puget Sound Business Journal. Archived from the original on December 28, 2008. Retrieved November 15, 2022.