Benchtop spectrophotometers: BYK-Gardner USA Columbia, Md.doi:10.1016/S0026-0576(97)89058-7ELSEVIERMetal Finishing
Spectrophotometers: Byk-Gardner Silver Spring, Md.doi:10.1016/0026-0576(95)96107-0ELSEVIERMetal Finishing
Portable spectrophotometer: Byk-Gardner USA Silver Spring, Md.doi:10.1016/0026-0576(95)94326-9SDOSMetal Finishing