APA

Weille G. A. d., . (1975). An approach to the possibilities of forecasting downy mildew infection in onion crops. s'Gravenhage: Staatsdrukkerij.

Chicago

Weille G A de, . 1975. An approach to the possibilities of forecasting downy mildew infection in onion crops. s'Gravenhage: Staatsdrukkerij.

Harvard

Weille G. A. d., . (1975). An approach to the possibilities of forecasting downy mildew infection in onion crops. s'Gravenhage: Staatsdrukkerij.

MLA

Weille G A de, . An approach to the possibilities of forecasting downy mildew infection in onion crops. s'Gravenhage: Staatsdrukkerij. 1975.