TY  - BOOK
AU  - Croft, Terrell.
AU  - Hall, George H.
TI  - Practical electrical illumination and signal wiring method
U1  - 621.321 
PY  - 1939///
CY  - New York
PB  - McGraw Hill book company
KW  - Signal systems -- Wiring
KW  - Building wiring -- Methods
KW  - Practical electricity -- Instructional works
N1  - Includes index
ER  -