TY  - BOOK
AU  - Hart,William Le Roy
TI  - College trigonometry
AV  - QA531 .H32
U1  - 514 
PY  - 1951///]
CY  - Boston
PB  - Heath
KW  - Trigonometry
UR  - http://www.archive.org/details/collegetrigonome00hart
UR  - http://www.openlibrary.org/books/OL6092577M
ER  -