Paperback, 10 pt with gloss laminate on outside. 64 pages + cover, perfect bound, 8.5”x11”. Copyright 2021, published by NAUI Worldwide and Performance Freediving International, Inc.
Paperback, 10 pt with gloss laminate on outside. 108 pages + cover, perfect bound, 8.5”x11”. Copyright 2018, published by NAUI Worldwide and Performance Freediving International, Inc.