id	keyword
american_scientific_journal-986	water
american_scientific_journal-986	groundwater
american_scientific_journal-986	value
american_scientific_journal-986	layer
american_scientific_journal-986	area
american_scientific_journal-986	resistivity
american_scientific_journal-986	engineering
american_scientific_journal-986	journal
american_scientific_journal-986	quality
american_scientific_journal-986	sandstone
american_scientific_journal-986	research
american_scientific_journal-986	samples