| 1 |
Railroad administration / by Ray Morris
2nd ed. / rev. and largely rewritten by William E. Hooper. - New York : D. Appleton , 1930
|
| 2 |
Principles of transportation / by Emory R. Johnson, Grover G. Huebner [and] G. Lloyd Wilson
New York : D. Appleton , 1928
|
| 3 |
Railroad consolidation : its economics and controlling principles / by Julius Grodinsky ; with an introduction by Emory R. Johnson
New York : D. Appleton , 1930
|
| 4 |
Principles of ocean transportation / by Emory R. Johnson and Grover G. Huebner
New York : D. Appleton , 1929
|
| 5 |
Motor traffic management / by G. Lloyd Wilson
New York : D. Appleton , 1928
|
Mendeley出力
