Standard Test Method for Density, Relative Density (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method— 6 стр.
Testing of petroleum products; determination of the lead content (total lead) of gasolines with a mass concentration of lead from 4 up to 25 mg/l; wavelengthdispersive X-ray spectrometry (XRS)— 3 стр.