PN C04573 ArkusZ02-1974 Water and waste water Tests for organie solvents extrac- table matters Determination of impolar and polar of petroleum extractable organie matters by gravimetric method
1974PN C04573 ArkusZ02-1974 Water and waste water Tests for organie solvents extrac- table matters Determination of impolar and polar of petroleum extractable organie matters by gravimetric method