000
00252 a2200121 4500
080
_a
631.1(062.1)
_b
P 963
245
1
_a
Proceedings
260
_a
London
_c
1950
650
_a
Agricultural Economists
100
_a
_d
300
_a
372 p.
901
_a
31179
999
_c
42650
_d
42650