David Dubinsky Ceremonial Groundbreaking Shovel, 6036/099 MB, Box: 1. Kheel Center for Labor-Management Documentation & Archives.
David Dubinsky Ceremonial Groundbreaking Shovel, 6036/099 MB, Box: 1. Kheel Center for Labor-Management Documentation & Archives. https://aspace3-test.library.cornell.edu/repositories/4/resources/12983 Accessed October 12, 2025.
