Proceedings of Conference on day care of children of working mothers,  with special reference to defense areas, held in Washington, D. C., July 31 and August 1, 1941 ... 

 - Washington,  U.S. Govt. print. off.,  1942. 
 - v, 84 p. 
<br/><br/> At head of title: United States Dept. of labor, Frances Perkins, secretary.  Children's bureau, Katharine F. Lenroot, chief. 
<br/><br/><label>LCCN: </label>l  42000135  
<br/><br/><label>LC Class. No.: </label>HV854  / .C6 1941 
<br/><br/><label>National Library of Medicine Call No.: </label>W1  / UN6181 no.281 1942