Field-Book for Railroad Engineers: Containing Formulae for Laying Out Curves, Determining Frog Angles, Levelling, Calculating Earth-Work, Etc., ... Magnetic Variation, Logarithms, Logarithmic - Hardcover

Henck, John Benjamin

 
9780266544838: Field-Book for Railroad Engineers: Containing Formulae for Laying Out Curves, Determining Frog Angles, Levelling, Calculating Earth-Work, Etc., ... Magnetic Variation, Logarithms, Logarithmic