Berkowitz, J. H.  1884- <br/><br/>
The eyesight of school children :  defective vision as related to school environment, and methods of prevention and correction / 
by J.H. Berkowitz. 
 - Washington :  Govt. print. off.,  1920. 
 - 128 p. front. :  illus., plates ;  23 cm. 
<br/><br/> At head of title: Department of the interior... 
<br/><br/>Copy 1 of L111.A6 with: Natural science teaching in Great Britain / Committee on Natural Science in the Educational System of Great Britain. Washington : Govt. Print. Off., 1919. Bound together subsequent to publication. Copy 2 of L111.A6 with: Public discussion and information service of university extension / Walton S. Bittner. Washington : Govt. Print. Off., 1920. Bound together subsequent to publication. 
<br/><br/><label>LCCN: </label>e  20000628  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Eye--Care and hygiene.<br/>Eye--Diseases.
<br/><br/><label>LC Class. No.: </label>L111  / .A6 1919, no. 65