https://publications-cnrc.canada.ca/fra/voir/objet/?id=f35de7b6-4650-4798-a286-64806250e05f
Journal of the Optical Society of America, 1960, Volume : 50, Numéro : July 7
Authors were affiliated with the "Division of Applied Physics" of NRC at the time of publication. That NRC division is obsolete
Article de périodique (revue)