National Travel Survey: Travel During 1977. Bureau of the Census, U.S. Department of Commerce, Washington, D.C. October 1979. 362p. $7.50
1974 ◽
Vol 12
(4)
◽
pp. 29-29
◽
2015 ◽
Vol 49
◽
pp. 86-97
◽
2018 ◽
Vol 9
◽
pp. 96-104
◽
Keyword(s):
2012 ◽
Vol 66
(Suppl 1)
◽
pp. A14.2-A14
Keyword(s):