Scots pine diseases : proceedings of an international symposium, Kórnik, Poland, 16-20, May 1989 : joint meeting: 7th European Colloquium of Forest Pathologists and the members of two IUFRO working parties, S2.05.04 Resistance of pines to Melampsora pinitorqua, S2.06.02 Canker and shoot blight of conifers
Scots pine diseases : proceedings of an international symposium, Kórnik, Poland, 16-20, May 1989 : joint meeting: 7th European Colloquium of Forest Pathologists and the members of two IUFRO working parties, S2.05.04 Resistance of pines to Melampsora pinitorqua, S2.06.02 Canker and shoot blight of conifers
Scots pine diseases : proceedings of an international symposium, Kórnik, Poland, 16-20, May 1989 : joint meeting: 7th European Colloquium of Forest Pathologists and the members of two IUFRO working parties, S2.05.04 Resistance of pines to Melampsora pinitorqua, S2.06.02 Canker and shoot blight of conifers
Scots pine diseases : proceedings of an international symposium, Kórnik, Poland, 16-20, May 1989 : joint meeting: 7th European Colloquium of Forest Pathologists and the members of two IUFRO working parties, S2.05.04 Resistance of pines to Melampsora pinitorqua, S2.06.02 Canker and shoot blight of conifers