ISO 4718:1981 [ Withdrawn ] Oil of lemongrass (Cymbopogon flexuosus) standard by International Organization for Standardization, 04/01/1981
ISO 6584:1981 Cleaning equipment for air and other gases -- Classification of dust separators standard by International Organization for Standardization, 03/01/1981
ISO 6327:1981 Gas analysis -- Determination of the water dew point of natural gas -- Cooled surface condensation hygrometers standard by International Organization for Standardization, 03/01/1981
ISO 697:1981 Surface active agents -- Washing powders -- Determination of apparent density -- Method by measuring the mass of a given volume standard by International Organization for Standardization, 03/01/1981
ISO 6303:1981 Pressure vessel steels not included in ISO 2604, Parts 1 to 6 - Derivation of long-time stress rupture properties standard by International Organization for Standardization, 03/01/1981
ISO 6727:1981 Road vehicles - Motorcycles - Symbols for controls, indicators and telltales standard by International Organization for Standardization, 03/01/1981
ISO 4571:1981 Manganese ores and concentrates -- Determination of potassium and sodium content -- Flame atomic emission spectrometric method standard by International Organization for Standardization, 03/01/1981
ISO 6127:1981 Chromium ores -- Determination of phosphorus content -- Reduced molybdophosphate photometric method standard by International Organization for Standardization, 03/01/1981
ISO 302:1981 [ Withdrawn ] Pulps; Determination of Kappa number standard by International Organization for Standardization, 02/01/1981
ISO 1750:1981/Amd6:2018 - Amendment 6: Meptyldinocap Amendment by International Organization for Standardization, 02/01/1981
ISO 6645:1981 Wheat flour -- Determination of dry gluten standard by International Organization for Standardization, 02/01/1981
ISO 6827:1981 Aluminium and aluminium alloys - Determination of titanium content - Diantipyrylmethane photometric method standard by International Organization for Standardization, 02/01/1981