The biggest, best compilation of U.S. labor law materials is BNA's Labor Relations Reporter, which has about 20 volumes. Other good publications include CCH's Labor Law Reporter, Kheel on Labor Law, Termination of Employment (which includes a summary of the Federal and state termination laws), and Larson's Employment Discrimination.
The Catherwood Library in Cornell's School of Industrial and Labor Relations holds probably the best collection of U.S. labor-related materials. The Library's fee-based service, known as "ILR: Access," handles labor-related research questions and provides copies of materials from the Library's collection. The Library posts Subject Guides for researching Collective Bargaining, Unions, Human Resources, and other labor-related topics. Links to other labor libraries are posted by the Institute for Research on Labor and Employment.
The BNA Daily Labor Report is a key publication for following labor law developments. CCH publishes the rival Employment Law Daily. Also, labor law news is available in Westlaw's LBNEWS database.
Department of Labor: For materials from the U.S. Department of Labor and its various agencies, See "United States Department of Labor."
Foreign and International: The Labor and Employment module of Practical Law Company provides summaries of the employment laws of many countries, as does The Littler Mendelson Guide to International Employment and Labor Law (LexisNexis). See also "Foreign Laws."
Unfair Labor Practices Charges: Subscribers can search a database of unfair labor practices charges filed with the NLRB on BNA Labor PLUS.