TY  - BOOK
AU  - Lockwood, Fred.
AU  - 
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 0893973793 (U.S.) :;0749407093 (U.K.) :
SN  - 2
PY  - 1992///46
CY  - New York :;London
PB  - Nichols Pub. ;;Kogan Page
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Aids and devices
KW  - Distance education;Teaching
KW  - Programmed instruction
N1  - Includes bibliographical references (p. ); 5
ER  -