TY  - BOOK
AU  - Rich
AU  - Dressler
TI  - Algebra two and trigonometry
SN  - 0877202206
U1  - 512.9 
PY  - 1972///,
CY  - New york
PB  - Amsco school publications,inc.
KW  - Numbers and sets of numbers
KW  - Subsets
KW  - comparing sets
N1  - Index
ER  -