id	keyword
american_scientific_journal-2684	vlf.em
american_scientific_journal-2684	figure
american_scientific_journal-2684	field
american_scientific_journal-2684	dyke
american_scientific_journal-2684	journal
american_scientific_journal-2684	engineering
american_scientific_journal-2684	direction
american_scientific_journal-2684	research
american_scientific_journal-2684	east