Modern Refrigeration and Air Conditioning, 19th or 20th Edition, Althous, Turnquist, Bowditch, Bracciano
4.
Lessons in Electric Circuits Volume 1 – DC (Chapters 1, 2, 3, 5, and 8), 5th Edition, 2021, Kuphaldt, Tony
5.
Lessons in Electric Circuits Volume 2 – AC (Chapter 1), 6th Edition, 2007, Kuphaldt, Tony – DC (Chapters 1, 2, 3, 5, and 8), 5th Edition, Kuphaldt, Tony
6.
Boiler & Pressure Vessel Safety Act, Title 12, Subtitle 9 Annotated Code of Maryland
7.
Business Occupations & Professions, Annotated Code of Maryland, Title 6.5 Annotated Code of Maryland
8.
Maryland Regulations ("COMAR"), Title 09, Subtitle 17
NOTE: The PSI bulletin shows the same code reference twice (reference #6). Links for both code sections go to the same location.
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