TY  - BOOK
AU  - Penna,Judith A.
AU  - Bell,Daphne A.
TI  - Graphing calculator manual : : precalculus graph & models, a unit circle approach, algebra and trogonometry graph & model, a unit circle approach / 
SN  - 0201709422   
PY  - 2001///.
CY  - Boston
PB  - Addison Wesley, 
KW  - Cruise ships
KW  - Ocean travel
ER  -