grey literature

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الإنجليزية - الإنجليزية
Informally published written material (such as reports) that may be difficult to trace via conventional channels such as published journals and monographs because it is not published commercially or is not widely accessible
grey literature

    الواصلة

    grey lit·e·ra·ture

    التركية النطق

    grey lîtırıçır

    النطق

    /ˈgrā ˈlətərəʧər/ /ˈɡreɪ ˈlɪtɜrəʧɜr/
المفضلات