A final report is given on wavelength measurements in air of eleven lines of Ar I and three of Hg<sup>198</sup> I in the near infrared, for use as secondary standards. Measurements of a preliminary character on three other lines are also included. These measurements have been made in the course of several years’ time by means of a corner-reflector interferometer of the Michelson type with reversible fringe counter and static fringe interpolator.
EDSON R. PECK, BAIJ NATH KHANNA, and N. C. ANDERHOLM, "Secondary Standards of Ar I and Hg198 I in the Near Infrared," J. Opt. Soc. Am. 52, 536-538 (1962)