Bourke, P. M. A., & Robertson, G. W. (1970). The forecasting from weather data of potato blight and other plant diseases and pests: First report of the Working Group on Weather and Plant Pathology Problems, of the Commission for Agricultural Meteorology. Geneva: Secretariat of the World Meteorological Organization.

Bourke, P. M. Austin, and George W. Robertson. The Forecasting From Weather Data of Potato Blight and Other Plant Diseases and Pests: First Report of the Working Group On Weather and Plant Pathology Problems, of the Commission for Agricultural Meteorology. Geneva: Secretariat of the World Meteorological Organization, 1970.

Bourke, P. M. Austin, and George W. Robertson. The Forecasting From Weather Data of Potato Blight and Other Plant Diseases and Pests: First Report of the Working Group On Weather and Plant Pathology Problems, of the Commission for Agricultural Meteorology. Geneva: Secretariat of the World Meteorological Organization, 1970.