@base . a , , ; , , ; "Handbook of agricultural economics." ; ; ; ; "1875-5747" ; ; ; "1875-5747" ; ; "1875-5747" ; "Handbook of agricultural economics." , "Handbook of agricultural economics (Online)" ; . a ; "1574-0072" ; . a ; ; "20071214115200.0"^^ ; ; . a ; . a . a ; "1875-5747" ; . . "Netherlands" . a , ; "Handbook of agricultural economics (Online)" .