Every effort is made to collect at a comprehensive level in each of those areas where present strengths exist (described below). Due to the multi-disciplinary focus of industrial relations it is also necessary to build a very basic level collection of monographs and serials from the disciplines of economics, law, political science, psychology and sociology. Grey literature from labor unions/employer associations is collected extensively.
The strength of the ILR collection lies in Library of Congress (LC) class HD. It is here that titles on collective bargaining, industrial relations, labor disputes, labor economics (employment/unemployment, wage structure, discrimination, poverty, education and training, fringe benefits), labor/labor union history, contemporary labor-management relations issues, as well as those dealing with international and comparative industrial relations are to be found. Two other "micro" areas of strength are HF5549 (human resource studies) and those components of HM where material on organizational behavior (organizations, leadership, power, social groups) is found. In addition, the collection selectively includes materials from LC classes: HA1-20 (statistics); HB-HC (economics); HQ1060-1064 (ageing and retirement), HV (social and public welfare as it relates to employment); KD-KF, KJ-KZ (primarily labor laws and legislation); RC (occupational safety and health); T55-60 (primarily work measurement, industrial efficiency).