TY  - BOOK
AU  - Roark, Raymond J
TI  - Formulas for stress and strain
U1  - 620.11 
PY  - 1954///
CY  - New York
PB  - Mc Graw - Hill
KW  - Strain and stresses-Formulas
N1  - pt.1. Definations and symbols-pt.2. Facts;principles;methods-pt.3. Formulas and examples
ER  -