main index
P00: frame around
P01: olicognography
P03: infrastructures
wayout:contact
ecologicalplanning
tropicfertilizers
agricultureparameters
erosionsoils
agri.chainsupply
spatialeconometrics
greenaccounting
landcost
exergyeconomics
sustain.dev.param.
organicagriculture
affordabledemand
