Electronic Resource
Passow, A. Harry
;
Landsheere, Gilbert
;
Peterson, A. D. C.
;
[et al.]
Noah, Harold J.
;
Saltzman, Henry
;
Halls, W. D.
;
Bishop, Gordon
;
Goodings, Richard F.
;
Bracken, Helmut
;
Hilker, Franz
;
Casey, Daniel J.
;
Super, Donald E.
;
Schleicher, Klaus
;
Postlethwaite, Neville
;
Nel, B. F.
;
Roeder, Peter Martin
;
... and further 7
Springer
International review of education
14 (1968), S. 328-375