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Zorn, P.; Emanoil, M.; Marshall, L.; Panek, M.: Advanced searching : tricks of the trade (1996)
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Zorn, P.; Emanoil, M.; Marshall, L.; Panek, M.: Advanced searching : tricks of the trade (1997)
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Marshall, L.: ¬The MEDLINE database : more accessible, convenient, and dangerous! (1997)
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