Cook, Katherine Margaret O'Brien. <br/><br/>
State laws and regulations governing teachers' certificates / 
by Katherine M. Cook. 
 - Washington :  G.P.O.,  1921. 
 - 244 p. :  ill., maps ;  23 cm. 
 - Bulletin / Department of the Interior, Bureau of Education ;  1921, no. 22 .
 - Bulletin (United States. Bureau of Education) ;  1921, no. 22 .
<br/><br/> Includes index. 
<br/><br/><label>LCCN: </label>e  21000522  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teachers--Certification--States.--United States
<br/><br/><label>LC Class. No.: </label>L111  / .A6 1921, no. 22