MPG.eBooks - Search Results - (((("source research studies") OR ("source search studies"))) or ((("sources research series") or ("sources research service"))))

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If you are trying to use Boolean operators, they must be ALL CAPS: (((("source research studies") OR ("source search studies"))) OR ((("sources research series") OR ("sources research service")))).
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Removing quotes may allow a broader search: (((( source research studies ) OR ( source search studies ))) or ((( sources research series ) or ( sources research service )))).
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