Ferguson, Susan <br/><br/>
Profound mental handicap  [Texte imprimé] / 
David Norris, Susan Ferguson, Sophie Levitt 
 - Kent:  Castello Educational,  1982 
<br/><br/>Bibliogr. p. 163-167 
<br/><br/><label>ISBN: </label>0-7104-0001-2 
<br/><br/><label>Dewey Class. No.: </label>649.151