Johnston, Sean, 1956- A history of light and colour measurement science in the shadows / [electronic resource] : Sean F. Johnston. - Bristol Institute of Physics Publishing, c2001. - 1 online resource. Includes bibliographical references and index. ISBN: 9780750307543 9780585488271 (electronic bk.) Subjects--Topical Terms: Photometry--History.Colorimetry--History.Radiation--Measurement--History. LC Class. No.: QC391 / .J64 2001