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Soroll (13)
Ensenyament universitari (12)
2 - Religion. Theology (11)
37 - Education (11)
Antenes (Electrònica) (11)
65 - Communication and transport industries. Accountancy. Business management. Public relations (10)
80 - General questions relating to both linguistics and literature. Philology (10)
71 - Physical planning. Regional, town and country planning. Landscapes, parks, gardens (9)
Ensenyament--Metodologia (9)
Arquitectura--Ensenyament (8)