TY  - BOOK
AU  - Merril, William Emery
TI  - Iron truss bridges for railroads: Methods of calculating strains with a comparison of the most prominent truss bridges, and new formulas for bridge computations ; the economical angles for struts and ties 
AV  - TG380 M47 1870
PY  - 1870///
CY  - New York
PB  - D. Van Nostrand
KW  - Puentes
ER  -