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New Haven : Pub. for the Institute of human relations by Yale university press; London : H. Milford, Oxford university press, 1940.
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New Haven : Pub. for the Institute of Human Relations by Yale University Press; London : H. Milford, Oxford University Press, 1941.
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New Haven : Pub. for the Institute of human relations by Yale university press; London : H. Milford, Oxford university press, 1942.