id	keyword
gc-1118	+ +
gc-1118	iron
gc-1118	slags
gc-1118	ore
gc-1118	ores
gc-1118	samples
gc-1118	geochemical
gc-1118	bog
gc-1118	virje
gc-1118	doi
gc-1118	et al
gc-1118	iron ores
gc-1118	iron slags
gc-1118	elements
gc-1118	trace
gc-1118	bog iron
gc-1118	site
gc-1118	hlebine