TY  - GEN
AU  - Maxfield, John E
AU  - Maxfield, Margaret W
TI  - Keys to mathematics
SN  - 0721661939
U1  - 510 
PY  - 1973///
CY  - Philadelphia
PB  - W.B. Saunders
KW  - ANALYTIC GEOMETRY
KW  - BOOLEAN ALGEBRA
KW  - MATHEMATICS
ER  -