TY  - BOOK
AU  - Lapelle, Roll
AU  - Rutledge
TI  - PRACTICAL VACUUM SYSTEMS
U1  - 621.55 
PY  - 1972///
CY  - New York
PB  - Mcgraw-Hill
KW  - Vacuum Technology
N1  - Bibl. : P. 229-230
ER  -