1.
Biodynamic Farm Agriculture in Service of the Earth and Humanity
by Koepf, Herbert H.
ISBN: 9780880101721
List Price: $30.00
2.
Koepf's Practical Biodynamics: Soil, Compost, Sprays and Food Quality
by Herbert H. Koepf
ISBN: 9780863159268
List Price: $19.99
3.
5.
Research in Biodynamic Agriculture: Methods and Results
by Herbert H. Koepf
ISBN: 9780938250340
List Price: $9.95