Yoshii K (1992). “An Analysis of the Efficiency of the Agricultural Mutual Relief Association and the Prefectural Federation of the Agricultural Mutual Relief Association of Japan.” Operations Research: Communications of Operations Research Society of Japan 37(1): 18-24.
Yoshii K (1992). “An Analysis of the Efficiency of the Agricultural Mutual Relief Association and the Prefectural Federation of the Agricultural Mutual Relief Association of Japan.” Operations Research: Communications of Operations Research Society of Japan 37(1): 18-24.