TY  - BOOK
AU  - Helsel,Sandra K.
TI  - Interactive optical technologies in education and training: markets and trends
SN  - 088736392X
U1  - 381.45658312404 20
PY  - 1990///
CY  - Westport, Conn.
PB  - Meckler
KW  - Educational technology industries
KW  - Instructional materials industry
KW  - Audio-visual equipment industry
KW  - Computer industry
KW  - Market surveys
N1  - Glossary:p. 123 - 125; Includes bibliographical references and index
ER  -