OS GSO 127:1990 METHODS OF TESTING FOR CRUDE PETROLEUM AND PETROLEUM PRODUCTS – DETERMINATION OF DENSITY, RELATIVE DENSITY AND API GRAVITY OF CRUDE PETROLEUM AND LIQUID PETROLEUM PRODUCTS BY HYDROMETER METHOD
1970OS GSO 127:1990 METHODS OF TESTING FOR CRUDE PETROLEUM AND PETROLEUM PRODUCTS – DETERMINATION OF DENSITY, RELATIVE DENSITY AND API GRAVITY OF CRUDE PETROLEUM AND LIQUID PETROLEUM PRODUCTS BY HYDROMETER METHOD