The fifth volume is a membership ledger and the remaining volumes are minutes. The agenda of the minutes typically include interaction with other unions, new business, and finances. The financial statement includes membership dues and expenses. Beginning with 1927 membership ledgers and the minutes were bound in the same volumes. The early membership ledgers show that many of the members had Irish names.

Prior to 1917, two separate unions existed. The Bindery Women's Union Local 125 organized in 1902. The International Brotherhood of Bookbinders Local 31 traces its genesis back to the Journeymen Bookbinders' Association of the Pacific Coast adopting its first Constition and By- laws in 1875. In July 1917 their merger formed one union, the Bookbinders and Bindery Women's Union, Local 31-125. The men's local included these skills: book binders, paper rulers, paper cutters, and folding machine operators. Women did only bookbinding except for bronze work. The Bindery Workers Union Local 21, of Palo Alto, CA, organized in 1947 representing Stanford University Press employees. Local 21 voted to merge with Local 31- 125 in 1969.

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