Packard Rosa Covington. <br/><br/>
The Hidden Hinge / 
Rosa Covington Packard. 
 - N.Y. :  Notre Dame, Ind. :  Ballantine Books ;  Fides Publishers,  1972. 
 - v, 218 p. ;  18 cm. 
<br/><br/>Bibliography: p. 206-214 
<br/><br/><label>ISBN: </label>0819000744 
<br/><br/><label>Nat. Bib. No.: </label>74188958 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>1021860  ChTaNC 
<br/><br/><label>Subjects--Personal Names: </label><br/>Montessori Maria 1870-1952. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education, Preschool.<br/>Self-development.<br/>教育
<br/><br/><label>LC Class. No.: </label>LB1140.2  / .P28 
<br/><br/><label>Dewey Class. No.: </label>372.1/3