 | Mary Van Kleeck : American Social Scientist of the 20th Century, a Notable Figure in the American Labor Movement, and a Proponent of Scientific Management and a Planned Economy — BrowsingJune 26, 1883 — June 8, 1972 |
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| Mary Van Kleeck : American Social Scientist of the 20th Century, a Notable Figure in the American Labor Movement, and a Proponent of Scientific Management and a Planned Economy — BrowsingJune 26, 1883 — June 8, 1972 |
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