Bio-dynamic agriculture
Subtitle: an introduction
By: by Herbert H.Koepf, Bo D. Pettersson, Wolfgang Schaumann.
Contributors: Pettersson, Bo D.; Schaumann, Wolfgang.
Publisher: Anthroposophic Press
Published: 1976
Place of publication: New York
Language: eng
Number of pages: 429
Subjects: Organic farming.
Notes: Bibliography: p.404-416.