TY  - BOOK
AU  - Salas,Saturnino L.
AU  - Salas,Charles G.
TI  - Precalculus: a short course 
SN  - 0536010498
PY  - 1975///
CY  - Lexington, Mass
PB  - Xerox College Pub.
N1  - Includes index
ER  -