TY  - BOOK
AU  - Briggs, David J.
AU  - Courtney,Frank M.
ED  - 1                                                                                                                                                                                                                                                              . 
TI  - Agriculture and environment : The physical geography of temperate agricultural systems / 
SN  - 0-582-30000-2
U1  - 630.912 
PY  - 1985///
CY  - London : 
PB  - Longman , 
ER  -