TY  - BOOK
AU  - DUNOYER (L)
TI  - Vacuum practice Tr by J H Smith
U1  - 535/29 
PY  - 1926///
CY  - London
PB  - G Bell & Sons Ltd.
KW  - Vacuum
KW  - Tr
KW  - Smith
KW  - practice
KW  - J
KW  - H
KW  - by
ER  -