TY  - BOOK
AU  - Clarholm,Marianne
AU  - Bergström,L.
TI  - Ecology of arable land: perspectives and challenges 
SN  - 0792304241
AV  - S589.7.E26 1989 
U1  - 630/.2/745 
PY  - 1989///
CY  - Dordrecht, Boston
PB  - Kluwer Academic
KW  - Agricultural ecology
KW  - Congresses
KW  - Soil ecology
KW  - Plant-soil relationships
N1  - "Proceedings of a international symposium 9-12 June, 1987, Swedish University of Agricultural Sciences, Uppsala, Sweden."
ER  -