Accompanying the correspondence in this collection is a card catalog that is divided into two sections: subject index and name index. The subject index contains cards that are arranged alphabetically by a particular subject heading. On each card is the number assigned the correspondence pertaining to that subject heading; the name of the correspondent; and in some cases, the date of York's response. The list of subject headings is included below.

• Card Catalog: Assembly Correspondence Subject Index - Subject Headings
• Agriculture
• Armon System of Sewage Disposal
• Assessors
• Attorney General Opinions
• Birch Society
• Birth Control
• Blue Book
• Boundary Area Commission
• Branch Banking
• Budget
• Budget - Education
• CESA
• Civil Disruptions
• Congratulations
• Conservation - Name changed to Natural Resources
• Corporate Farming
• County College
• CPA
• State Council for Home and Family (filed under Council for Home and Family)
• Dangerous Drug Laws
• Dirksen Amendment
• Education
• Education Committee
• Elections Committee
• Election Laws
• Electoral Reform
• Ethics
• Family Planning
• Federal
• Four State Compact
• Great Lakes Basin Commission
• Health and Social Services
• Higher Education Committee
• Highway Safety
• Information
• Industry, Labor and Human Relations
• Insurance
• Judges - Salaries
• Law Enforcement
• Legislative Council
• Legislation Request
• Liquor Laws
• Local Affairs and Development
• Minnesota - Wisconsin Boundary Area Commission
• Miscellaneous
• Municipalities - Annexation
• Natural Resources
• None
• Nursing Board
• Nursing Homes
• Pending Legislation
• Personal
• Pesticide Review Board
• Pierce County Republican Party
• Political
• Problem
• Propaganda
• Publications
• Public Instruction - Department of
• Reapportionment
• Reciprocity
• Revenue
• River Falls State College
• Road Tests for Drivers
• S-13
• School Aids (Private Schools)
• School Bus
• Selective Service System
• Sex Education
• Snowmobiles
• Speaking Engagement
• Speech
• Tarr Task Force
• Taxes
• Teachers Retirement
• Capitol Tours [filed under Tours]
• Transportation
• Tuition Reimbursement
• United Council of Wisconsin State Student Government
• University Disturbances
• University of Wisconsin - Madison
• Upper Mississippi Basin Committee
• Veterans
• Veterans Affairs
• Veterinary School
• Vocational Area Training
• Water Pollution - Farm Wastes
• Welfare Committee
• Wisconsin State University - River Falls
• York Legis[lation] -LRB 602