International symposium on horticultural economics in developing countries : (1. : ; 1989
Titolo
First international symposium on horticultural economics in developing countries : Alemaya, Ethiopia, 16-23 July 1989 ; convener A. P. Verhaegh ; editors A. de Jager, A. P. Verhaegh ; Commission economics and management
Pubbl/distr/stampa
Wageningen (NL) : International society for horticultural science, [1991]