The objective of this paper is to understand users' preferences regarding internet service in public library. For this purpose, we employed adaptive conjoint analysis (ACA) and conducted computer based interviews with 470 visitors to Ibaraki Prefectural Library. As conjoint attributes, seven items were noted: site restriction, assistance given by library staff, time restrictions, waiting time, privacy, use in combination with printed matter, and application necessity. The results show that ability in using the internet and the purpose of the visit lead to different results in the average importance of "staff assistance" and "site restrictions", while "privacy" was commonly regarded as a principal attribute. Based on these users' preferences, we discussed preferable location and environment for computers of the internet service in a public library. It is suggested that the targeted segment should be clarified to account for distinct preferences of various users.

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Japanese early books are preserved in various institutions worldwide. The construction of a Union Catalogue Database in which as many items as possible are recorded is extremely significant. It enables us to grasp where we can find what kinds of titles, and it constitutes an indispensable infrastructure of academic information for Japanese studies. For a long time Kokusho somokuroku has been used as the standard source for this purpose. But further constructions of a Union Catalogue based on the bibliographic method applied in this source will show limits in the online shared cataloguing environment. It is a matter of fact that codes of standard bibliographic description are essential for the construction of a Union Catalogue. Nevertheless publishing methods and processes of Japanese early books differ from those of modern materials. Hence rules for early books should take account of these differences. This paper discusses basic problems and suggests their solutions. The issues proposed here include range of target materials, application of ISBD, bibliographic unit level, source of information and bibliographic volumes.

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