TY  - BOOK
AU  - Ernst, G. C.
AU  - Swihart, G. R.
AU  - Riveland, A. R.
TI  - Principles of structures equilibrium: a study of equilibrium conditions by graphic force-moment, and virtual displacement (virtual work) principles
U1  - 624.171 
PY  - 1962///
CY  - USA
PB  - University of Nebraska
N1  - Includes index
ER  -