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International Journal of Occupational Safety and Ergonomics : JOSE|March 25, 2010
Facilities for music education and their acoustical designHeli Koskinen, Esko Toppila, Pekka Olkinuora
Logopedics, Phoniatrics, Vocology|October 12, 2002
Vocal loading among day care center teachersEeva Sala, Erkko Airo, Pekka Olkinuora, et al.
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