In an 8-Hour Day, the Average Worker Is Productive for This Many Hours | Inc.com

https://www.inc.com/melanie-curtin/in-an-8-hour-day-the-average-worker-is-productive-for-this-many-hours.html

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First saved: 2017-Sep-18 (Mon)
Last checked: 2017-Sep-18 (Mon), response 200