1977 Census of Transportation: National travel survey. v United States. Bureau of the Census Published: 1979 Total Pages: 422 Get eBook
1977 Census of Transportation: National travel survey. pt. 2. Travel during 1977 United States. Bureau of the Census Published: 1979 Total Pages: 414 Get eBook
National Travel Survey United States. Bureau of the Census Published: 1973 Total Pages: 328 Get eBook
1972 Census of Transportation United States. Bureau of the Census Published: 1974 Total Pages: 322 Get eBook
1972 Economic Censuses United States. Bureau of the Census Published: 1976 Total Pages: 492 Get eBook
