TY  - GEN
AU  - Howes, Vernon E
AU  - Howes, Vernon E 
TI  - Pre-calculus mathematics : a programmed text 
U1  - 510 
PY  - 1967///
CY  - New York 
PB  - Wiley
KW  - Algebra
KW  - Sets
KW  - Programmed instruction
KW  - Fuctions
KW  - Trigonometry
KW  - Mathematics
N1  - v.1 Algebra
v.2 Fuctions and relations 
v.3 Analytic trigonometry; 2067-11-11
ER  -