TY  - BOOK
AU  - Osborne, C. W., 
AU  - Trott, A. J. 
ED  - Association for Educational and Training Technology. 
TI  - International yearbook of educational and instructional technology 1986/87 / 
SN  - 1850911037 
U1  - 371.3078 23
PY  - 1986///.
CY  - London : 
PB  - Kogan Page, 
KW  - Tecnologie dell'istruzione - Annuari.
ER  -