TY  - BOOK
AU  - Hartmann,Robert R.
TI  - Graphics for designers: a studio workbook 
SN  - 0813807603
PY  - 1976///
CY  - Ames
PB  - Iowa State University Press
KW  - Design
KW  - Graphic arts
KW  - Visual perception
N1  - Bibliography: p. 123
ER  -