TY  - BOOK
AU  - Downton, Andy
TI  - Engineering the Human Computer Interface 
SN  - 0077073215
U1  - 005.1 
PY  - 1991///
CY  - London : 
PB  - McGraw-Hill, 
KW  - Human Computer Interaction
KW  - User Interfaces Computer Systems
N1  - NN
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-07-707321-5.pdf
ER  -