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1nork Park, K.
Argitaratua 1994"The twelfth edition published under the title Textbook of preventive and social medicine."--t.p. verso.
Includes index.Liburua -
2nork Park, K.
Argitaratua 2007"The twelfth edition published under the title Textbook of preventive andsocial medicine."--t.p. verso.Liburua