Text ( visual ) : unmediated Design issues for urban and regional information systems / Jeffrey Willis. -- London : Centre for Environmental Studies , 1972. -- 134 p. : ill., maps ; 30 cm. -- (Working papers ; CES WP 71). -- Bibliography: p. 128-134. -- (BA24809076) ; https://ci.nii.ac.jp/ncid/BA24809076 Author Heading(s): Willis, Jeffrey. -- Classification(s): LCC : HT166 ; DC : 711. -- Subject Heading(s): LCSH : City planning -- Data processing ; LCSH : Regional planning -- Data processing