By Ek Ellen   Remes Jouko   Sovio Ulla   in Social Indicators Research

ISSN:0303-8300|69|2|219-242

Springer Publishing Company ‎(2004)‎

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By Sipilä Kirsi   Ylöstalo Pekka   Ek Ellen   Zitting Paavo   Knuuttila Matti   in Acta Odontologica Scandinavica

ISSN:0001-6357|64|3|177-182

Informa Healthcare‎(2006)‎

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