TY  - BOOK
AU  - Brummelen, Glen Van
TI  - The mathematics of the heavens and the earth: the early history of trigonometry
SN  - 9780691129730
U1  - 516.2409 
PY  - 2009///
CY  - Princeton
PB  - Princeton University Press
KW  - Trigonometry -- History
ER  -