TY  - BOOK
AU  - Harary, Frank
AU  - Cartwright`, Dorwin
AU  - Norman, Robert Z.
TI  - Structural models: an introduction to the theory of directed graphs
U1  - 511.5 HAR-; 
PY  - 1965///
CY  - New York
PB  - John Wiley
KW  - Structural engineering
KW  - Graph theory
KW  - Directed graphs
KW  - Structural frames - Models
N1  - Includes index
ER  -