Hogan, Paul. <br/><br/>
Playgrounds for free :  the utilization of used and surplus materials in playground construction / 
Paul Hogan. 
 - Cambridge, Mass. :  MIT Press,  [1974]. 
 - 252 p. :  ill. 
<br/><br/><label>ISBN: </label>0262080788 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Playgrounds.<br/>Playgrounds--Equipment and supplies.