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573 - General and theoretical biology (2)
578 - Virology (2)
620 - Materials testing. Commercial materials. Power stations. Economics of energy (2)
629 - Transport vehicle engineering (2)
635 - Garden plants. Gardening (2)
Aliments -- Indústria i comerç (2)
Aliments -- Microbiologia (2)
Aliments -- Qualitat (2)
Aqüicultura (2)
Col (2)