TY  - BOOK
AU  - Purchase, Helen C.
TI  - Experimental human-computer interaction: a practical guide with visual examples
SN  - 9780521279543
U1  - 004.019 
PY  - 2012///
CY  - New York
PB  - Cambridge University Press
KW  - Human computer -- Interaction
KW  - Human engineering
ER  -