Shotov A.P. , Zasavitsky I.I. , Astakhov V.I. , Galaktionov V.V. , Kosichkin Y.V. , Nadezdinskiy A.I. , Khattatov V.U. Carbonic oxide content measurements over sounding paths in the ground atmospheric layer with the use of a tuned semiconductor laser. IAMAR Third Scientific Assembly. 17-28 Aug. 1981, Hamburg , с. P.112