@techreport{weko_178276_1,
   author	 = "Kazuaki,Kishida",
   title	 = "An Experiment on Simple and Practical Methods of Cluster Labeling for Hierarchically Organized Document Subsets",
   year 	 = "2017",
   institution	 = "School of Library and Information Science, Keio University",
   number	 = "10",
   month	 = "mar"
}