TY  - BOOK
AU  - Husen,Torsten
AU  - Postlethwaite,T.Neville
TI  - The International Encyclopedia of Education Research and Studies : Vol.9 T-Z
SN  - 0-08-028119-2
U1  - 370.03 
PY  - 1985///
CY  - Oxford
PB  - Pergamos press
KW  - Education
ER  -