Originally published : London : Rudolf Steiner Press, 1974.
Translation from the German 4th ed.
v. 1. A guide to understanding its nature
v. 2. Flowering plants.
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The plant by Gerbert Grohmann. ISBN 9780938250234. Published by Bio-dynamic Farming & Gardening Association Inc. in 1989. Publication and catalogue information, links to buy online and reader comments.
