Duncan, Helen, 1909-  Duncan, Helen, 1909- <br/><br/>
The treehouse / 
by Helen Duncan. 
 - Toronto :  Simon & Pierre Pub. Co.,  c1975. 
<br/><br/><label>ISBN: </label>  
<br/><br/><label>LCCN: </label>76373398 //r85 
<br/><br/><label>Nat. Bib. No.: </label>C75-10434-1 
<br/><br/><label>LC Class. No.: </label>PZ4.D91154  PR9199.3.D86  / Tr 
<br/><br/><label>Dewey Class. No.: </label>813/.5/4