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- 4 จริยธรรมสิ่งแวดล้อม
- 3 จิตอาสาสิ่งแวดล้อม
- 2 Environmental volunteers
- 1 Developing occupational health an...
- 1 Environmental volunteer
- 1 Environmental volunteerism
- 1 Hazardous waste management
- 1 Learning model for problems and p...
- 1 Local government organizations
- 1 Plan of learning activities on wa...
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Date issued
- 1 2021