id	keyword
gc-1231	cave
gc-1231	dripwater
gc-1231	et al
gc-1231	air
gc-1231	doi
gc-1231	co2
gc-1231	cave air
gc-1231	variability
gc-1231	ratios
gc-1231	site
gc-1231	grgosova
gc-1231	monitoring
gc-1231	results