The changing contexts of teaching :  ninety-first yearbook of the National Society for the Study of Education : part.1 / 
ed. Ann Lieberman. 
 - Chicago [E.U.A.] :  NSSE,  1992. 
 - 250 p. 
<br/><br/><label>ISBN: </label>00775762 
<br/><br/><label>Encabezamiento--Tema: </label><br/>Innovaciones educativas<br/>Educación--Investigación