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Seasonal variations in employment in the United States

Seasonal variations in employment in the United States
紙図書
by W.S. WoytinskyCommittee on Social Security, Social Science Research Council1939
全国の図書館
  • 一般注記"A report prepared for the Committee on Social Security ...
  • 著者標目Woytinsky, Wladimir S. Social Scienc...

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