Graver, Dennis. <br/><br/>
Padi dive manuals / 
written by Dennis Graver. 
 - Santa Ana, California :  Professional Association of Diving Instructors,  c1978. 
 - vii, 128 p. : ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Diving--Handbooks, manuals, etc.