| Cigar Makers Official Journal | Publications |
| CIO Councilor | Publications |
| CIO Fact Sheet | Publications |
| CIO News | Publications |
| CIO News, Western Maryland Edition | Publications |
| CIO News, Wisconsin Edition | Publications |
| CIO Pamphlets | Publications |
| CIO Union News | Publications |
| Citadel | Publications |
| CLAT Publications | Publications |
| Clear Newsletter | Publications |
| Cleveland Union Leader | Publications |
| Clip Sheet | Publications |
| Commercial Telegraphers Journal | Publications |
| Committee Publications | Publications |
| Common Sense | Publications |
| Communicator | Publications |
| Community Services Committee Publications | Publications |
| Conference on Labor Law | Publications |
| Conference Reports, Publications | Publications |
| Congressional Legislative Advisory | Publications |
| Congressional Legislative Alert | Publications |
| Constitution | Publications |
| Constitution, Carriage and Wagon Workers International Union of North America | Publications |
| Constitutions | Publications |
| Constitutions and By-laws | Publications |
| Constitutions and By-laws, Pamphlets | Publications |
| Constitutions and Bylaws | Publications |
| Constitutions and Bylaws, Brotherhood of Maintenance of Way Employes | Publications |
| Constitutions and Resolutions | Publications |
| Constitutions, American Newspaper Guild | Publications |
| Constitutions, Declarations of Principles | Publications |
| Constitutions, Resolutions, Officer Reports | Publications |
| Constitutions, State Federations and Councils | Publications |
| Constitutions, The Newspaper Guild | Publications |
| Construction Craftsman | Publications |
| Contract Agreements | Publications |
| Contract Bulletin | Publications |
| Contracts | Publications |
| Contracts, Districts - 11 | Publications |
| Contracts, Districts - 12 | Publications |
| Contracts, Districts - 14, 21, 25 | Publications |
| Contracts, Districts - 15, 17, 19 | Publications |
| Contracts, Districts - 2, 3, 5 | Publications |
| Contracts, Districts - 21 | Publications |
| Contracts, Districts - 6, 9, 10 | Publications |
| Convention Appeals, Agricultural Implement Department | Publications |
| Convention Proceedings | Publications |
| Convention Proceedings | Publications |
| Convention Proceedings | Publications |
