Clark, John R. <br/><br/>
Snorkeling :  a complete guide to the underwater experience / 
John R. Clark ; in cooperation with the Oceanic Society. 
 - Englewood Cliffs, NJ :  Prentice Hall, Inc.,  1985. 
 - 191 p. ;  il. ;  23 cm. 
<br/><br/>Incluye índice (pp. 187-191). 
<br/><br/><br/>Inglés 
<br/><br/><label>ISBN: </label>013815192X 
<br/><br/><label>Dewey Class. No.: </label>797.232