| Author | Popularity |
| Samuelson, Paul A. (Paul Anthony), 1915- |
2 |
| Skidmore, Felicity |
2 |
| Coleman, John R |
1 |
| Dentler, Robert A. |
1 |
| Fair, Ray C. (Ray Clarence), 1942- |
1 |
| Polsby, Nelson W. |
1 |
| Polytechnic of Central London. Transport Studies Group |
1 |
| Smith, Paul A. |
1 |
| Stanley, P. A. |
1 |
| White, Peter R. |
1 |