TY  - BOOK
AU  - Bonshor,R.R.
TI  - Graphical aids for tolerances and fits: : handbook for manufacturers designers and builders
AV  - QTO TS172.B66 
PY  - 1974///
CY  - London
PB  - Her Majesty Stationary Office
KW  - Engineering graphics
KW  - Tolerance (Engineering)
ER  -