House documents, 85th Congress. 300. Report of factors for use in apportioning funds for National System of Interstate and Defense Highways, letter from Secretary of Commerce transmitting estimate of cost cf completing National System of Interstate and Defense Highways in each State and District of Columbia, prepared for purpose of apportioning interstate system funds authorized for fiscal years 1960, 1961, and 1962, pursuant to sec. 108 (d) of Federal-aid highway act of 1956.