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	1.	Image from Google Jackets	Air conditioning and refrigeration troubleshooting handbook LANGLEY, BILLY C. by LANGLEY, BILLY C Material type: Text; Format: print ; Literary form: Not fiction Publication details: Virginia ; Reston ; 1980 Availability: Items available for loan: Government Punjab Public Library Lahore (1)Call number: 697.930288 L22A 1980. Place hold Save to lists
	2.	Image from Google Jackets	Air Conditioning and refrigeration troubleshooting handbook by Langley, Billy C Edition: 0 Material type: Text Publication details: Reston(Virgina) Reston 1980 Availability: Items available for loan: Quaid-e-Azam Library, Lahore (1). Place hold Save to lists
	3.	Image from Google Jackets	Estimating air conditioning systems by Langley, Billy C Edition: 0 Material type: Text Publication details: Reston Reston Publishing 1983 Availability: Items available for loan: Quaid-e-Azam Library, Lahore (1). Place hold Save to lists
	4.	Image from Google Jackets	Heating systems troubleshooting handbook / by Langley, Billy C Material type: Text; Format: print ; Literary form: Not fiction Publication details: Prentice Hall, ; 1988 Availability: Items available for loan: HITEC University Taxila (1)Call number: 697.07 LAN. Place hold Save to lists
	5.	Image from Google Jackets	Refrigeration and air conditioning by Langley Billy c Material type: Text; Format: print ; Literary form: Not fiction Availability: Items available for loan: University of Engineering & Technology (1)Call number: 621.56 L26R. Place hold Save to lists
	6.	Image from Google Jackets	Refrigeration and air conditioning by Langley, Billy C Edition: 2 Material type: Text Publication details: Reston Reston Publishing 1982 Availability: Items available for loan: Quaid-e-Azam Library, Lahore (1). Place hold Save to lists

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