TY  - BOOK
AU  - Ledgard,Henry F.
AU  - Singer,Andrew,1943-
AU  - Whiteside,John,1946-
TI  - Directions in human factors for interactive systems
PY  - 1981///
CY  - Berlin
PB  - Springer-Verlag
KW  - Interactive computer systems
KW  - Human engineering
N1  - Bibliography:p.177-188; Includes index
ER  -