Ethiopia: Committee on Development Information, 2003.
"Research has produced hard facts that libraries pay fully for their existence, and even produce positive returns on the investments made on them. For example, long-term studies of technical libraries using return on investment analysis (ROI) established that in monetary terms libraries produce 515% annual return on investment, that is five times more than what is invested on them per annum (Keyes, 1995; Griffiths and King, 1993). Cost-benefit analysis also showed that the benefits derived from library services outweigh the cost of providing them. (McClure et al, 2000)."
