title: Alternative sources of TLVs.
authors.forename: R L
authors.initials: RL
authors.lastname: Zielhuis
authors.forename: A A
authors.initials: AA
authors.lastname: Wibowo
mesh_terms: D007391:International Cooperation; D008452:Maximum Allowable Concentration; D009314:National Institute for Occupational Safety and Health, U.S.; D014481:United States; D014489:United States Occupational Safety and Health Administration