Tessmer, Martin <br/><br/>
Beyond instructional effectiveness : key environmental decisions for instructional designers as change agents 

 - 16-20 
 - 1990 30, No. 7 
<br/><br/>Enero 1991 
 = EDUCATIONAL TECHNOLOGY 
<br/><br/><label>Encabezamiento--Término de Indización: </label>AMBIENTE EDUCATIVO EFICACIA DE LA ENSE\197ANZA ENSEÑANZA PROGRAMADA