1.

図書
図書
1. Education, medical care and welfare for the mentally retarded in Japan : 1976-1977
edited by Japan League for the Mentally Retarded
出版情報: Tokyo, Japan : Nihon Bunka Kagakusha, c1977
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2.

図書
図書
2. Labour laws of Japan, 1990. [6th ed.]
Ministry of Labour, Japan
出版情報: Tokyo : Institute of Labour Administration, 1990
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