TY  - BOOK
AU  - Foerster, Paul A.
TI  - Instructors commentary and solutions for trigonometry: Functions and applications 
SN  - 0201019973
U1  - 516.24 FOE 
PY  - 1977///
CY  - California, London
PB  - Addison-Wesley Publishing company
KW  - Trigonometry
KW  -  Problems, exercises, etc
ER  -