TY - BOOK AU - Ravden,Susannah J. AU - Johnson,G.I. TI - Evaluating usability of human-computer interfaces: a practical method SN - 0745806147 (Horwood) AV - QA76.9.I58 R38 1989b U1 - 004/.01/9 20 PY - 1989/// CY - Chichester [England], New York, Chichester PB - E. Horwood, Halsted Press KW - Interactive computer systems KW - Evaluation KW - Human-computer interaction KW - End-user computing N1 - Includes bibliographical references and index ER -