CARRIER GAS PROGRAMMING IN GAS CHROMATOGRAPHY BY MEANS OF ALTERNATELY CONNECTED COL UMNS UNDER ISOTHERMAL CONDITIONS Period. Polytech. Chem. Eng. [Internet]. 1968 Jan. 1 [cited 2024 Dec. 29];12(3):223-8. Available from: https://pp.omikk.bme.hu/ch/article/view/3408