TY  - BOOK
AU  - Waddington,Conrad Hal
TI  - Tools for thought: how to understand and apply the latest scientific techniques of problem solving 
U1  - 003 
PY  - 1977///
CY  - New York, NY.
PB  - Basic
KW  - Análisis de sistemas
N1  - Incluye bibliografía
ER  -