TY  - GEN
AU  - METCALFE, T. J.
TI  - Weighing Machines: A Treatise in Three Volumes, Vol. 2, Semi-self-Indicating and Semi-Indicating Mechanisms 
SN  - 85264 131 1
U1  - 6621.3 MET 
PY  - 1969///
CY  - London
PB  - Griffin
ER  -