id	keyword
ajceb-1583	labour
ajceb-1583	productivity
ajceb-1583	fixing
ajceb-1583	construction
ajceb-1583	labour productivity
ajceb-1583	buildability
ajceb-1583	rebar
ajceb-1583	slabs
ajceb-1583	reinforcement
ajceb-1583	factors
ajceb-1583	journal
ajceb-1583	level
ajceb-1583	building
ajceb-1583	economics