Electronic Resource
Woodhall, Maureen
;
Baritsch, M.
;
Elvin, Lionel
;
[et al.]
Blackstone, Tessa
;
Cropley, A. J.
;
Zymelman, Manuel
;
Knoll, Joachim H.
;
Stock, R.
;
Mohrhart, Dieter
;
Maslany, G. W.
;
Koehl, Robert
Springer
International review of education
20 (1974), S. 249-266