000 00323nam a2200133Ia 4500
008 160316s1985 xxu||||| |||| 00| 0 eng d
020 _a
100 _aDavid J Briggs
245 _aAgriculture And Environment
250 _a1
260 _aLONDON
_bLONGMAN GROUP LTD.
_c1985
300 _a442
700 _aFrank M Courtney
_a
999 _c25377
_d25377