@article{weko_2081_1,
   author	 = "山本,二三丸",
   title	 = "協業の経済学的考察",
   journal	 = "立教經濟學研究",
   year 	 = "1986",
   volume	 = "40",
   number	 = "2",
   pages	 = "27--67"
}