id	keyword
gc-231	terra rossa
gc-231	clay
gc-231	soil
gc-231	et al
gc-231	limestone
gc-231	durn
gc-231	residue
gc-231	mediterranean
gc-231	fig
gc-231	material
gc-231	mineral
gc-231	loess
gc-231	istria
gc-231	fraction
gc-231	region
gc-231	dolomite