Subjects: “…[Building industry.]…”

Subjects: “…[Electrotechnical industry.]…”

Subjects: “…[Electrotechnical industry.]…”

Subjects: “…[Diamond industry.]…”

Subjects: “…[Building industry.]…”

Subjects: “…[Building industry.]…”

Subjects: “…[Metal industry.]…”

Subjects: “…[Building industry.]…”

Subjects: “…[Diamond industry.]…”

Subjects: “…[Building industry.]…”

Subjects: “…[Electrotechnical industry.]…”

Subjects: “…[Building materials industry.]…”

Subjects: “…[Graphic industry., Employees.]…”

Subjects: “…[Witco Chemical., Chemical industry.]…”

Subjects: “…[Electrotechnical industry., Technical staff.]…”

Subjects: “…[NKF (Delfzijl), Electrotechnical industry.]…”

Subjects: “…[Metal industry., Metal workers.]…”

Subjects: “…[Electrotechnical industry., Technical staff.]…”

Subjects: “…[Rubber industry., Factory workers.]…”

Subjects: “…[DAF (Eindhoven), Car industry.]…”