Diseases of widely planted forest trees - International Union of Forestry Research Organizations. Working Group on International Cooperation in Forest Disease Research. Section 24: Forest Protection.; FAO/IUFRO Symposium on Internationally Dangerous Forest Diseases; Insects Oxford, Eng.) ([Washington, U.S. Dept. of Agriculture, Forest Service, 1964, 1964)
https://www.biodiversitylibrary.org/bibliography/178803
Keywords: Congresses|Diseases and pests|Trees|