The collection was divided into multiple series due to its large size. Series I is composed of advertising materials, pamphlets, menus, bulletins, and voter ballots by Wolverine Citizens Printing between 1918 and 1923. What is arranged in Series I is what remains of what was accessioned in 1965. Extensive weeding removed empty envelops and letterhead that lacked prices and services offered. Government publications were retained, in particular those related to the Flint Board of Health when William DeKleine served as director. The Flint Board of Health contracted Wolverine Citizens to print many health notices related to the 1918 smallpox epidemic, the Spanish influenza, and proper handling of milk canisters. Other government bodies include the Flint Board of Education and the Flint Police Force. Materials retained from private organizations include business cards, coupons, and restaurant menus, bulletins issued by businesses, copies of bond tickets when the city of Flint raised money to pay for road improvements, and advertisements for social events. Numerous organizations contracted with Wolverine Citizens, including the Knights of Columbus, Flint Board of Education, Consumers Power Company, and Hardy Bakery.