Johnson, Ralph L.,  <br/><br/>
YMCA pool operations manual 

 - 2nd. ed. 
 - 145 pages :   illustrations ;   28 cm 
<br/><br/><label>ISBN: </label>0873226569 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Swimming pools - Handbooks, manuals, etc. ; YMCA of the USA
<br/><br/><label>Dewey Class. No.: </label>363.7929