TY  - BOOK
AU  - Power,B.D
AU  - 
TI  - High vacuum pumping equipment 
U1  - 537.53/POH 
PY  - 0000///Chapman and Hall
PY  - 1966///
CY  - Lond.
KW  - Vacuum tubes
N1  - Includes index and Bibliography and Glossary.
ER  -