FED-STD-209D (NOTICE 1), FEDERAL STANDARD: AIRBORNE PARTICULATE CLEANLINESS CLASSES IN CLEANROOMS AND CLEAN ZONES (28 JAN 1991) [S/S BY ISO14644-1 AND ISO14644-2]
FED-STD-209D (NOTICE 1), FEDERAL STANDARD: AIRBORNE PARTICULATE CLEANLINESS CLASSES IN CLEANROOMS AND CLEAN ZONES (28 JAN 1991) [S/S BY ISO14644-1 AND ISO14644-2].