| Type |  Book |
| ชื่อเรื่อง | Highway beautification : the environmental movement's greatest failure / (by) C.F. Floyd and P.J. Shedd, foreword by Robert T. Stafford |
| ผู้แต่ง | Floyd, Charles F |
| พิมพลักษณ์ | Boulder, colo., : Westview Press, c1979 |
| รูปเล่ม | xiv, 183 p. : ill |
| หัวเรื่อง | Billboards --Law and legislation --United States [] |
| | Roadside improvement --Law and legislation --United States [] |
| | Signs and sign --United States [] |