TY  - BOOK
AU  - Blackburn,Hugh
TI  - Elements of Plane Trigonometry: For the use of the junior class of mathematics in the University of Glasgow
AV  - QA 
PY  - 2010///
PB  - Project Gutenberg
KW  - Plane trigonometry
N1  - Public domain in the USA; Electronic text
UR  - http://www.gutenberg.org/ebooks/32973
ER  -