I agree that this site is using cookies. You can find further informations here.
X
Merkliste 
 1 Ergebnisse 
 
1

A Continuous Progress Learning Center:

Sachs, Marvin C. ; Taylor, R. W. W.
The Mathematics Teacher.  69 (1976)  5 - p. 381 ff. , 1976
Link: https://www.jstor.org/stable/27960504