id	keyword
american_scientific_journal-1955	groundwater
american_scientific_journal-1955	zaria
american_scientific_journal-1955	zones
american_scientific_journal-1955	area
american_scientific_journal-1955	potential
american_scientific_journal-1955	journal
american_scientific_journal-1955	map
american_scientific_journal-1955	research
american_scientific_journal-1955	study
american_scientific_journal-1955	technology