図書館資料の言語別統計

その3　学術専門図書館

抄録

The purpose of this language survey is to observe quantitatively the present status of foreign book collections (Korean and Chinese books are excluded) in Japanese special and academic libraries.
This is the third report on the subject mentioned above.
The 1960ー1965 editions of “Union Catalog of Foreign Books Acquired by 49 Libraries in Japan” (abbreviated as UCFB) were analysed in this study to find out (1) the language distribution, (2) the acquisition speed and (3) the overlapping of the materials among libraries. To make a comparison, the same kinds of analysis were excuted for the National Union Catalog, U.S.A. (abbreviated as NUC) and the library catalogs of three medium size universities in Japan. The findings are as follows.
(1) Language distribution
More than 90% of foreign language books in Japanese academic libraries were composed of the materials in English (60%) German (20%) Russian (10%) and French (7-8%). The rest were those in Italian, Spanish, Rumanian, Turkish, Persian and Czeck.
The percentage of the distribution for Spanish materials in UCFB was less than that in NUC, and the percentage for Italian materials in UCFB was almost equal to that in NUC.
Since 1960, more materials in Russian have been acquired by Japanese academic libraries than those in French. Percentage of French materials before 1960 was higher than that of Russian materials.
(2) Acquisition speed
In this investigation, the acquisition speed of foreign books was indicated by the difference between publication and acquisition dates. It was found that the less materials were acquired as the difference between publication date and acquisition date became larger. The highest percentage (35-40%) was attained by the materials whose acquisition time lag is one year (e. g. Publication year-Acquisition year=1 year). As the time lag increased to 10 years, the percentage of materials recorded in NUC and UCFB decreased to about 1% of the highest number, while the percentage of materials in three university library catalogs decreased to about 10% of the highest.
(3) Overlapping of materials
The UCFB is the union catalog of 49 special and academic libraries in Japan. This investigation showed that about 40% of books listed in this union catalog were acquired by more than one library. The analysis also showed that percentage of the materials overlapped in other libraries did not change for six years e. g. from 1960 to 1965.
More than 80% of the materials recorded in one year edition of UCFB were also listed in five year cummulated edition of NUC, and about 20% of the materials listed in one year edition of NUC were duplicated with those listed in one year edition of UCFB.