TY  - BOOK
AU  - Shlaer, Sally.
AU  - Mellor, Stephen J.
TI  - Object lifecycles: Modeling the world in states
T2  - Your Don Press Computing Series
SN  - 0136299407
U1  - 005.1 
PY  - 1992///
CY  - New Jersey
PB  - Yourdon Press
ER  -