TY  - BOOK
AU  - Henck, John Benjamin,
TI  - Field-book for railroad engineers: containing formulae for hying out curves, determining frog angles, levelling, calculating earthwork, etc., etc., together with tables of radii, ordinates, deflections, lang chords, magnetic variation, logarithms, logaritmic and natural sines, tangents, etc., etc. 
AV  - TF205 H45
PY  - 1874///
CY  - New York
PB  - Appleton
KW  - Ingeniería de ferrocarriles
KW  - Manuales
ER  -