TY  - BOOK
AU  - Gagne, Robert Mills
AU  - Melton, Arthur W.
TI  - Psychological principles in system development: edited by R.M. Gagneforeword by Arthur W. Melton
U1  - 159.9 
CY  - New York
PB  - Holt, Rinehart and Winston
KW  - Systems engineering
KW  - Human engineering
ER  -