id	keyword
ejh-518	productivity
ejh-518	work
ejh-518	journal
ejh-518	training
ejh-518	efficiency
ejh-518	workers
ejh-518	development
ejh-518	www.ajpojournals.org
ejh-518	quality
ejh-518	oil
ejh-518	life
ejh-518	employee
ejh-518	management
ejh-518	marketing
ejh-518	companies
ejh-518	performance
ejh-518	effectiveness