3G handy guide :  refrigeration systems servicing / 
3G E-learning LLC 
 - New York :  3G E-learning LLC,  2020. 
 - vii, 235 p.: col. Ill.; 23.5 cm. 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>9781984637901 
<br/><br/><label>Dewey Class. No.: </label>C 621.56 T531 2020