TY  - BOOK
AU  - Penna, Judith A.
TI  - Elementary algebra: concepts and applications
SN  - 0201173948
U1  - HS Cir 512.9 P381 1990 
PY  - 1990///
CY  - America
PB  - Addison-Wesley Publishing Company, Inc.
KW  - Algebra
ER  -