Annual Book of ASTM Standards, Part 32 (American Society for Testing and Materials, Philadelphia, Pa., 1970), Standard E101–67, p. 474.
3.
MurphyJ. F. and MortensenG. F., in Methods for Emission Spectrochemical Analysis (American Society for Testing and Materials, Philadelphia, Pa., 1971), E-2 SM 7–14, 6th ed., p. 698.