PRUYN, FRANCIS L.
Earth pressure and stability. 398.
PURDON, C.D.
Locomotive performance on grades, 329.
RANDOLPH, BEVERLY S.
"Locomotive Performance on Grades of Various Lengths." [321].
RICHARDS, JOSEPH T.
"Final Report of Special Committee on Rail Sections." [456].
ROBERTS, PERCIVAL, Jr.
"Final Report of Special Committee on Rail Sections." [456].