O'Toole, Brian. <br/><br/>
'Step by step' a community based rehabilitation project with desabled childrenin Guyana / 
Brian O'Toole. 
 - Paris :  New York :  ROME :  UNESCO;  UNICEF;  WFP,  1990. 
 - pág. irregular 
 - Notes, comments... ;  189. .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>376.2/.4 -053.2 (881)=20 OTO No.189.