Stern, B. J. (1927). Social factors in medical progress. Columbia university press; P.S. King & son, ltd..
Dyfyniad Arddull ChicagoStern, Bernhard Joseph. Social Factors in Medical Progress. New York, London: Columbia university press; P.S. King & son, ltd., 1927.
Dyfyniad MLAStern, Bernhard Joseph. Social Factors in Medical Progress. Columbia university press; P.S. King & son, ltd., 1927.
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