Twilight enhancement observation of the infrared helium line 10830 angstrom (nablyudeniye sumerochnoy vspyshki infrakrasnoy linii geliya 10830 angstrom)
Twilight enhancement observation of the infrared helium line 10830 angstrom (nablyudeniye sumerochnoy vspyshki infrakrasnoy linii geliya 10830 angstrom)