Voight, Ralph Claude. <br/><br/>
Invitation to learning :  the learning center handbook / 
by Ralph Claude Voight, in consultation with Jean Butler [and others] Illus. by Paul Butler. Foreword by John Nickols. 
 - Washington :  Acropolis Books,  c[1971] 
 - 149 p. :  illus. ;  26 cm. 
<br/><br/><label>ISBN: </label>0874913187 
<br/><br/><label>LCCN: </label>79150992 //r85 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classroom learning centers.<br/>Teaching--Aids and devices.
<br/><br/><label>LC Class. No.: </label>LB1027  LB1027  / .V64  / .V64 
<br/><br/><label>Dewey Class. No.: </label>371.3/078