TY  - BOOK
AU  - Rietz,Henry Lewis
TI  - Plane and spherical trigonometry
T2  - A Series of mathematical texts (for colleges)
AV  - QA531 .R53 1950
U1  - 514.5 
PY  - 1950///
CY  - New York
PB  - Macmillan
KW  - Trigonometry
KW  - Local
ER  -