During the last decade, research has become increasingly important to the profession of librarianship. Seven library schools now have doctoral programs, foundation grants have stimulated and supported scores of major projects, and the research method has been recognized as an accepted technique for solving library problems. The increasing volume of research has caused a serious difficulty: information about completed studies and active investigations is so widely scattered that it is not easily accessible. In this bulletin, a compilation of a major segment of completed research has been assembled for the first time. The abstracts included in this publication furnish a single source of information about doctoral research relating to library science from 1925 to 1960. All dissertations accepted by library schools accredited by the American Library Association were automatically included. Dissertations written in other university departments were included when they treated a central facet of librarianship. In each section of this publication, entries are arranged by these broad subject categories: (1) Background; (2) Organization and Administration; (3) Resources; (4) Reader Services; (5) Technical Processes, Documentation; (6) Personnel and Training; (7) International, Comparative, and Foreign Librarianship; and (8) Methods of Research and Evaluation. Appended are tabulations and analyses of the 224 dissertations abstracted in this publication. (Contains 3 tables.) [Best copy available has been provided.]