Hebb, Bertha Yell. <br/><br/>
Credit for professional improvement of teachers. 
By Bertha Y. Hebb. 
 - [Washington,  Govt. print. off.,  1922] 
 - 7 p.  23 cm. 
 - [U.S.] Bureau of education.  Teacher's leaflet  no. 16. March, 1922. .
<br/><br/> Caption title.  At head of title:  Department of the interior. 
<br/><br/><label>LCCN: </label>e  22000387  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teachers.
<br/><br/><label>LC Class. No.: </label>L111  / .A57 no. 16