UNE-EN ISO 3993:1996 LIQUEFIED PETROLEUM GAS AND LIGHT HYDROCARBONS. DETERMINATION OF DENSITY OR RELATIVE DENSITY. PRESSURE HYDROMETER METHOD. (ISO 3993:1984).
2011UNE-EN ISO 3993:1996 ERRATUM:2011 Liquefied petroleum gas and light hydrocarbons. Determination of density or relative density. Pressure hydrometer method. (ISO 3993:1984).
1996UNE-EN ISO 3993:1996 LIQUEFIED PETROLEUM GAS AND LIGHT HYDROCARBONS. DETERMINATION OF DENSITY OR RELATIVE DENSITY. PRESSURE HYDROMETER METHOD. (ISO 3993:1984).