TY  - BOOK
AU  - Heyd, David.E  Hostetler, Robert.P Larson, Roland.E
TI  - Trigonometry a graphing approach
SN  - 0-669-28296-0
U1  - 516.24 LAR  
PY  - 1995///
CY  - TORONTO
PB  - D.C HEATH AND COMPANY
KW  - TRIGONOMETRY
ER  -