Preparing for the NATE Exam: Air Conditioning and Heat Pumps: Refrigeration Service Engineers Society (RSES), Refrigeration Service Engineers Society (RSES), Refrigeration Service Engineers Society (RSES): 9781616071172: Amazon.com: Books
Geothermal Heat Pumps: A Guide for Planning and Installing: Ochsner, Karl: 9781844074068: Amazon.com: Books