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- Adsorção 4
- Adubação verde 2
- Adubos e fertilizantes 13
- Adubos e fertilizantes orgânicos 3
- Adult education 4
- Advertising 2
- Advertising copy 3
- Advertising-Language 1
- Aedes aegypti 1
- Aerobic exercises 1
- aerobic exercises 1
- Aeronautics Military - History - Brazil 1
- Aeronáutica militar - História - Brasil 1
- Aesthetics 4
- Aesthetics - Education 2
- Afeto 1
- Afforestation of cities 2
- Afforestation of city-Cruz Alta (RS) 1
- Afforestation of city-Passo Fundo (RS) 1
- Africa - History 1