1. 1
   Tankō shūgyōsha setai shūnyū chōsa hōkoku : Shōwa 23-nen 12-gatsu-Shōwa 25-nen 4-gatsu = Report of the coalminer's family income survey : December 1948-April 1950

   炭鉱就業者世帯収入調查報告 : 昭和23年12月- 昭和25年4月 = Report of the coalminer's family income survey : December 1948-April 1950.

   Published 1950

   [Tokyo] : Sōrifu Tōkeikyoku, Shōwa 25 [1950]

   89 p. : ill. ; 26 cm.

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2. 2
   Sekitan kōgyō

   石炭鑛業 /

   Published 1948

   [Tokyo] : Rōdōshō Shokugyō Anteikyoku, Shōwa 23 [1948]

   143 p. : ill. ; 21 cm.

   Also issued online.

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