TY  - GEN
ED  - BRITISH STANDARDS INSTITUTION
TI  - BS 4867 : Pt. 2 : August : 1972 : Specification for drawing boards and associated equipment - part 2 : Tee squares
PY  - 1972///
CY  - London
PB  - B.S.I.
N1  - STD1861
ER  -