TY  - BOOK
AU  - Hart, William L.
TI  - Plane and spherical trigonometry with applications
U1  - 516 H25p 1943 
PY  - 1943///
CY  - Boston
PB  - D.C. Heath
KW  - Algebra
UR  - https://sic-library.pilc.org.ph/cgi-bin/koha/opac-retrieve-file.pl?id=d4ed916296ce353b1c806ae62f0ce3d1
ER  -