Földünk és környezetünk 1. rész
environmental pollution, too much waste, recycling, selective collection, wrappings, group of pupils and teacher from Trefort secondary grammar school
| Institution: | Open Society Archives at Central European University |
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| Language: | Hungarian |
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:387f575c-eb68-4ed5-b429-ca8e8d83146d |