“But It's Hot Inside Your Car's Engine! / “Our Priceless Heritage” Has misc. information about U.S. Congress. c. 1960 rev. 1972., Box: 25, Folder: 5. Robert G. Nelson Grand Rapids and Michigan history collection, Collection 363. Grand Rapids History Center. https://archive.grpl.org/repositories/4/archival_objects/181772 Accessed November 23, 2024.