Plant disease forecasting : a symposium - United States. Plant Disease Survey. (Beltsville, Md, Plant Disease Survey, Division of Mycology and Disease Survey, Bureau of Plant Industry, Soils, and Agricultural Engineering, Agricultural Research Administration, United States Department of Agriculture, 1950)
https://www.biodiversitylibrary.org/bibliography/85559
Keywords: Congresses|Forecasting|Plant diseases|United States|