Plant quarantine problem : A General review of the biological, legal, administrative and public relations of plant quara - W.A. McCubbin (Denmark Copenhagen by Ejnar Munksgaard, 1954)
W.A. McCubbin: Plant quarantine problem : A General review of the biological, legal, administrative and public relations of plant quarantines with special reference to the united states situation. Denmark. Copenhagen by Ejnar Munksgaard, 1954.--(632.9
ENGLISH