1.マンハイム大学アイヒホルン教授の研究室(Lehrstuhl
von Prof.Dr.Eichhorn an der Universitaet
Mannheim)
2.ギーセン大学ブロイニッヒ教授の研究室(Professur fur Management personaler Versorgungsbetriebe
an der Uni.Giesen)
)
1日本経営学会(Japan Society of Business Administration)
2.公益事業学会(The Japan Soceity of Public
Utilty Economics)
3.国際公共経済学会(Japan Sceity of Research
and Information on Public and Co-operative
Economy)
4.交通権学会(Association for the Research
of Transport Problems and Human Rights)
5.鉄道史学会(Railway History Society of Japan)
: