@book{55636, author = {Venema, J. H. and Daink, F.}, title = {Papua New Guinea land evaluation systems (PNGLES)}, publisher = {Papua New Guinea. Department of Agriculture and Livestock, Land Utilisation Section}, year = {1992}, series = {Field document}, address = {Port Moresby, Papua New Guinea}, note = {FAO AG: TCP/PNG/0152} }