TY  - BOOK
AU  - Calingasan, Recto Rex M. 
TI  - Trigonometry : A Worksheet 
SN  - 978-971-27-2728-8
U1  - 512.13 
PY  - 2013///
CY  - Mandaluyong City 
PB  - Anvil Publishing 
KW  - Trigonometry
KW  - Graphic calculators
KW  - Mathematics
UR  - https://sic-library.pilc.org.ph/cgi-bin/koha/opac-retrieve-file.pl?id=a1b43435edcd5482983702ecddde6dbc
ER  -