title: Study of the simultaneous measurement of 3H and 14C by means of a gas-proportional counter.
mesh_terms: D002073:Butanes; D002250:Carbon Radioisotopes; D008697:Methane; D011874:Radiometry / Q000295:instrumentation*; D013997:Time Factors; D014316:Tritium
chemical_list: D002073:Butanes; D002250:Carbon Radioisotopes; D014316:Tritium; D008697:Methane