TY  - BOOK
AU  - Langley, Billy C.
TI  - Electromechanical and electronic controls for HVAC/R / 
SN  - 0139075690
U1  - FOR 621.56 L26e 1999 
PY  - 1999///
CY  - Upper Saddle River, New Jersey
PB  - Prentice Hall
KW  - Refrigeration and refrigerating machinery
KW  - Automatic control
KW  - Air conditioning
KW  - Control.
KW  - Heating
N1  - Includes index.
ER  -