Sunday, September 6, 2020

The Work-Factor System of Work Measurement - PMTS

 


http://wf-eng.slerahosting.com/html/wf_history.html



https://books.google.co.in/books/about/Work_factor_time_standards.html?id=GiUzAAAAMAAJ


https://books.google.co.in/books/about/Work_factor_Time_Standards.html?id=mKWZAAAAIAAJ



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