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Language
- $geng1
- Afrikaans1
- Afrikaans with English abstract17
- Bulgarian1
- Chiefly in English; some French and Portuguese1
- Chinese7
- Chinese with English abstract4
- Chinese, english1
- Contributions in French, English, Portuguese and Spanish.1
- Czech9
- Danish3
- Dutch51
- Dutch with English abstract1
- ENGLISH2
- ES1
- Enblish1
- Eng;iish1
- English50,164
- English / Afrikaans5
- English / Chinese1