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Wikipedia: de.wikipedia.or ... https://de.wikipedia.org/wiki/World_Journal_of_Surgery
Wikipedia: en.wikipedia.or ... https://en.wikipedia.org/wiki/World_Journal_of_Surgery
Wikipedia: uk.wikipedia.or ... https://uk.wikipedia.org/wiki/World_Journal_of_Surgery
SUDOC: www.sudoc.fr/03 ... http://www.sudoc.fr/039512630
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