共 16 条
[3]
CLIFTONHADLEY RS, 1994, SURVEILLANCE ECONOMI
[4]
Dickinson B., 1999, Economic assessment of livestock disease problems. Proceedings of a conference and workshops organised by the Department of Agricultural and Food Economics and the Centre for Agricultural Strategy, The University of Reading, held at The Town Hall, Reading, UK, on 2 March 1999., P51
[7]
*FAO, 1962, AN HLTH YB
[8]
GRINDLE RJ, 1985, USE ABUSE EC METHODS
[9]
HOWE KS, 1991, P 6 INT S VET EP EC
[10]
McInerney J., 1999, Economic assessment of livestock disease problems. Proceedings of a conference and workshops organised by the Department of Agricultural and Food Economics and the Centre for Agricultural Strategy, The University of Reading, held at The Town Hall, Reading, UK, on 2 March 1999., P25