21. Distribution of petroleum products by petroleum administration districts, l percent sample of waybill for all carload traffic terminated by class 1 steam railways, 3d and 4th quarter 1950. Bookmark Corporate/Agency Authors: Interstate Commerce Commission Publisher: Interstate Commerce Commission SuDoc number: IC 1.24:950/3-4
22. Distribution of petroleum products by petroleum administration districts, one percent sample of waybills for carload traffic terminated by class 1 railroads. Bookmark SuDoc number: IC 1.24:(date)