TY  - BOOK
AU  - ROBERTS,Richard W.
AU  - 
TI  - Ultrahigh Vacuum and its applications. 
U1  - 621.381512/ROU 
PY  - 0000///Prentice-Hall.
PY  - 1963///
CY  - Englewood Cliffs. 
KW  - Vacuum Tubes.
KW  - Vacuum Tubes
N1  - Includes index and bibliography.
ER  -