There are many associations and institutions worldwide with biologically/ecologically orientated guidelines with similar objectives and methods. Detailed information and lists of the associations can be found at

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The wein.plus encyclopaedia is a comprehensive, well-researched reference work. Available anytime and anywhere, it has become an indispensable part of teaching, used by students and myself alike. Highly recommended!
Dominik Trick
Technischer Lehrer, staatl. geprüfter Sommelier, Hotelfachschule Heidelberg