A comparative study on analytico-synthetic systems and enumerative systems which have been used in Korea was dealt. The writer tries to compare the adaptability of both systems for Korean author notations. The following topics are discussed in detail: 1) The objectives of the book numbers. 2) Korean alphabet as author numbers. a) Brevity, simplicity and the possibility of expansion. b) A study on the defects of the analytico-synthetic notation devised by Professor Jai Chul Lee. c) A study on the pronounceability and the ambiguity. 3) A comparative study on filing efficiency of the Professor Lee's author marks and the writer's.

The paper is aiming at a critical review of some important aspects of library cooperation in cataloging. It examines the developments of cooperation in cataloging in brief, attempts a detailed account of centralized and cooperative cataloging by bringing out the strengths and weaknesses of each, and reviews important cooperative projects in cataloging as they have been carried out on regional, national and international levels. Examination is made of such cooperative ventures as technical service centers, a variety of Library of Congress programs designed to ease the burden of cataloging for libraries, and the shared cataloging part of the National Program for Acquisition and Cataloging.

Libraries both in the East and the West in terms of its usage went through various changes in meaning. The writer attempted an etymological study on the terms of libraries from the earliest time to the present time. Finding various ways and means of usage in the literature of past and present, the writer tries to suggest the best fitted term for libraries to the Korean usage. The suggestion which the writer intended to introduce is Munhun-gwan(文獻館) in the place of Dosu-gwan(圖書館).

The P'aerim and the Taedong Yasung are the two better known among unofficial history collections of the Yi Dynasty still available. The compilers and writers of unofficial historical records generally were people without official connection with the incidents recorded, and were thus in a position to be critical in their evaluation. Therefore, in order to gain a balanced view of Korean history, these unofficial history sources must also be consulted. However, there are differences in the contents of various unofficial history collections, even though the titles may be identical. For this reason, the writer has made a comparative study on the. contents of both the P'aerim and the Taedong Yasung. As a result, various differences between the two collections are noted. This points out the need for continued research on collections of unofficial historical records.