TY  - BOOK
AU  - BROWN (F G W)
TI  - Progressive trigonometry Part I
U1  - 512/10 
PY  - 1928///
CY  - London
PB  - Macmillan & Co. Ltd.
KW  - trigonometry
KW  - Progressive
KW  - Part
KW  - I
ER  -