What will happen to travel in the next 20 years? /
David T. Hartgen.
APA Citation
Hartgen, D. T., New York (State). Dept. of Transportation. Planning Research Unit. (1980). What will happen to travel in the next 20 years? Albany, N.Y.: Planning Research Unit, Planning Division, New York State Dept. of Transportation.
MLA Citation
Hartgen, David T, and New York (State). Dept. of Transportation. Planning Research Unit. What Will Happen to Travel In the Next 20 Years? Albany, N.Y.: Planning Research Unit, Planning Division, New York State Dept. of Transportation, 1980.
Warning: These citations may not always be complete (especially for serials).