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Checkbox | Miniature | Title | Author | Collection | Date | |
|---|---|---|---|---|---|---|
| No thumbnail | Bullying and cyberbullying in Polish elementary and middle schools : validation of questionnaires and nature of the phenomena | ESTERA TWARDOWSKA-STASZEK (Autor); Izabela Zych (Autor); Rosario Ortega-Ruiz (Autor) | Article | 2018 | ||