Leisure activities of young Turkish and Moroccan immigrants. Duration of residence in the Netherlands / household situation / residence permit / education / job conditions / leisure activities at home / sports / membership of sports club / experiences at sports club / sports activities outside sports club / other leisure activities not at home / membership public library / friends / family / contacts with Dutch people / remigration. Background variables: basic characteristics/ place of birth/ residence/ housing situation/ occupation/employment/ education/ consumption of durables/ readership, mass media, and 'cultural' exposure/ organizational membership