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Lua i Stíl Chicago (17ú heag.)Robert J. Gatchel. Low Back Pain: Recent Advances and Perspectives. MDPI - Multidisciplinary Digital Publishing Institute, 2018.
Lua MLA (9ú heag.)Robert J. Gatchel. Low Back Pain: Recent Advances and Perspectives. MDPI - Multidisciplinary Digital Publishing Institute, 2018.
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