TY  - BOOK
AU  - Nelson, Mark.
AU  - Poynter, Jane.
AU  - Silverstone, Sally.
TI  - Biosphere 2 agriculture: test bed for intensive, sustainable, non-polluting farming systems
KW  - Biósfera
KW  - Labranza de conservación
KW  - Sistemas de cultivo
N1  - Sobretiro de: Outlock on agriculture 22 (3) 1993 pp.167-174
ER  -