8V. E. Palmour, C. B. Marcia, R. V. Robert. Costs of Owning, Borrowing, and Disposing of Periodical Publications Arlington, VA: Center for Naval Analysis, 1977. 被引量:1
9M. Getz. Economics: Document Delivery. The Bottom Line, 1991--92(5). 被引量:1
10M. Getz. Economice: Increasing the value of user Time.The Bottom Line, 1987, 1(2). 被引量:1