Hans M Gregersen. (1990). FAO forestry paper N.96: Planning and managing forestry research: guidelines for managers. Rome: FAO.
Dyfyniad Arddull ChicagoHans M Gregersen. FAO Forestry Paper N.96: Planning and Managing Forestry Research: Guidelines for Managers. Rome: FAO, 1990.
Dyfyniad MLAHans M Gregersen. FAO Forestry Paper N.96: Planning and Managing Forestry Research: Guidelines for Managers. Rome: FAO, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.