1. Illinois trees: their diseases;Carter;Circ. Ill. nat. Hist. Surv.,1961
2. Scirrhia pini n.sp., the perfect state of Dothistroma pini Hulbary;Funk;Can. J. Bot.,1966
3. Recent research into Dothistroma blight of pines in Kenya;Gibson;Agric. vet. Chem.,1965
4. First observations in Kenya on a foliage disease of pines caused by Dothistroma pini Hulbary;Gibson;Commonw. For. Rev.,1964
5. Further observations in Kenya on a foliage disease of pines caused by Dothistroma pini Hulbary;Gibson;Commonw. For. Rev.,1965