information (2) Work (2) Singers (2) Science (2) Reality (2) Imagination (2) Effectiveness (2) état (1) réhabilitation (1) évolution (1) éducation (1) méthode (1) abords (agglomération) (1) Sjælland (1) Education (1) Development (1) Case (1) Control (1) Pictorial works (1) Choral singing--Instruction and study (1) Voice teachers (1) Technique (1) Charts, diagrams, etc (1) Voice (1) Visualization (1) Tokens (1) Tissues (1) Teachers (1) Students (1) Speech therapy (1)