TY  - GEN
AU  - Pfeiffer, Ehrenfried
TI  - Pfeiffer's introduction to biodynamics
SN  - 9780863158483
U1  - 631.584 
PY  - 2011///
CY  - Edinburgh
PB  - Floris Books
KW  - Bio dynamic farming
KW  - Organic farming
ER  -