This report is in two parts; the first part deals with a construction of a data base for bibliometric studies. The second part provides a detailed account of the results of those studies. Needs for a data base, the search for a possible candidate, and the decision to build the Check List of Social Sciences Serials (CLOSSS) are explained in the first part of this report. It also discusses the problems met in determining the area of study, defining the terms "serial" and social science, and deciding upon the number and nature of data elements that were to be drawn from the defined population for the purposes of bibliometric study. Planning and administration of data collection, and the organizational and methodological problems met in mounting a large bibliographic data collection are discussed in section 5 of part 1. Section 6 discusses the preparation of data for transfer to magnetic tape. The second part of the report involves a numerical and associative analysis of the file. Lengthy tables are included in the appendices. (Author/AP)