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Author

Helga Willer

5 books found

Cover of World of Organic Agriculture

World of Organic Agriculture

Minou Yussefi-Menzler, Helga Willer, Neil Sorensen · First published 2008

Cover of Training model for sustainable tourism on organic farms

Training model for sustainable tourism on organic farms

Helga Willer, Matthias Baerens · First published 2001

Cover of Organic agriculture in Europe

Organic agriculture in Europe

Stefanie Graf, Helga Willer · First published 2000

Placeholder cover for Ökologischer Landbau in der Republik Irland

Ökologischer Landbau in der Republik Irland

Helga Willer · First published 1992

Placeholder cover for O kologischer Landbau in der Republik Irland

O kologischer Landbau in der Republik Irland

Helga Willer · First published 1991