TY  - BOOK
AU  - Van Brummelen,Glen
TI  - Heavenly mathematics: the forgotten art of spherical trigonometry 
SN  - 9780691148922 (hardcover : alk. paper)
PY  - 2013///
CY  - Princeton
PB  - Princeton University Press
KW  - Spherical trigonometry
KW  - Trigonometry
ER  -