Bio-dynamic farming and gardening : soil fertility renewal and preservation /

Bibliographic Details

Main Author:	Pfeiffer, Ehrenfried
Other Authors:	Heckel, Fredrick
Format:	Book
Language:	English German
Published:	New York : London : Anthroposophic Press; Rudoff Steiner Publishing Co., 1938.
Subjects:	Soils. Fertilizers.