TY  - BOOK
AU  - Wittich, Walter A.
TI  - Instructional technology: its nature and use
SN  - 0-06-047169-7
PY  - 1979///
CY  - New York
PB  - Harper & Row, Publishers
UR  - http://krc.clri.res.in:80/cgi-bin/koha/opac-detail.pl?biblionumber=7066
ER  -