Padi dive manuals /
Graver, Dennis.
Padi dive manuals / written by Dennis Graver. - Santa Ana, California : Professional Association of Diving Instructors, c1978. - vii, 128 p. : ill.
Diving--Handbooks, manuals, etc.
Padi dive manuals / written by Dennis Graver. - Santa Ana, California : Professional Association of Diving Instructors, c1978. - vii, 128 p. : ill.
Diving--Handbooks, manuals, etc.