Hendrickson, Dean <br/><br/>
A study of needs for further learning as seen by teachers of secundary school mathematics / 
Dean Hendrickson and Mile Virant 
 - p. 655-664 
<br/><br/> En : Rev. school sciencie in mathematics. -- Vol. 57, no. 8 (Dic. 1978)  Fotocopia 
<br/><br/><label>Encabezamiento--Tema: </label><br/>Matemáticas--Estudio y enseñanza (Secundaria)