抄録
This is the seventh report of the fundamental investigations for the planning of the public library system to community area. The paper chiefly describes, this time, the financial efficiency of the public library services to service areas through the analysis of the relationships between the number of book circulations per capita and their costs. In this analysis we have found the way in which we can choose the best solution of the number of libraries, their adequate locations, and their suitable number of the book collections if we set up a goal to the number of book circulation in the area. In addition a reasonable boundary has been made clear to form a pattern of the service points; full time branch library, part time branch library, or a station of bookmobile system etc, .
