Electricity And Controls For Hvac-R by Stephen L Herman

Delmar's Standard Textbook Of Electricity - by Herman

Electronics for Electricians by Stephen L Herman

Practical Problems In Mathematics for Electricians by Stephen L. Herman

Electricity and Basic Electronics by Matt, Stephen R.; Marr, Stephen R.

Delmar's Standard Textbook Of Electricity - by Herman

Residential Construction Academy Electrical Principles by Stephen L Herman