• Economic assessment of different technological packages in yellow yam production 

      Instituto Interamericano de Cooperación para la Agricultura (IICA); Williamson, Verónica; Reyes Pacheco, Armando (IICA, 01-1996)
      7 tablas The study presents a general portrait of five diverse technological packages, and for each account income and cost of production schedules (listing all labour and material costs)