TY  - BOOK
AU  - Engelsohn, Harold S
TI  - Trigonometry : a complete and concrete approach
SN  - 007019419X
AV  - QA 531 Eng 
PY  - 1981///
CY  - New York
PB  - McGraw-Hill
KW  - MATHEMATICS--HANDBOOKS, MANUALS, ETC
KW  - TRIGONOMETRY
ER  -