The Prentice-Hall Guide EPA Refrigerant Handling Exam by Boyce H. Dwiggins and Edward F. Mahoney is a study guide designed to help individuals prepare for the EPA Refrigerant Handling Certification Exam. Published in 2000 by Prentice-Hall Inc., this book provides in-depth information on refrigerant handling and the requirements for certification. Presented in a convenient paperback format, this study guide is tailored towards education in the subject area and is written in English for easy understanding and comprehension. It serves as a valuable resource for those looking to obtain certification in refrigerant handling through the EPA.