Hanna, Lavone Agnes <br/><br/>
Unit teaching in the elementary school  social studies and related sciences 
/ by Lavone A. Hanna, Gladys L. Potter and Neva Hagaman 
 - Rinehart and Winston, New York  Holt  1955 
 - 592 p. : ill. ; 24 cm. 
<br/><br/><label>LCCN: </label>63-09182 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education, Elementary--Curricula