Snell, Foster Dee. Colorimetric methods of analysis : including photometric methods / Foster Dee Snell & Cornelia T. Snell. - New York : Van Nostrand Reinhold, 1970. - xii, 626 p. Volume IVAA. LCCN: 76-122672 Subjects--Topical Terms: Cororimetric analysis.Chemistry, Analytic.Colorimetry.Photometry.