https://dutchtrig.com/wp-content/uploads/Oslo-Kommune-Ny-Logo.png15001500Joris van den Nieuwenhuizenhttps://dutchtrig.com/wp-content/uploads/Logo-30-jaar-DutchTrig-RGB-1-300x231.jpgJoris van den Nieuwenhuizen2021-02-04 20:04:412022-05-19 16:00:38Norway: Intensified struggle against Dutch Elm Disease in Oslo