Text ( visual ) : unmediated Study of message text formats, bibliographic search queries / prepared by Philip L. Long ; edited and rev. by David C. Hartmann. -- Washington : Library of Congress : Available by request from Customer Services Section, Cataloging Distribution Service, Library of Congress , 1979. -- v, 28 p. ; 28 cm. -- (Network planning paper ; no. 5). -- Includes bibliographical references. -- ISBN 0844403164 ; (BA00997368) ; https://ci.nii.ac.jp/ncid/BA00997368 Author Heading(s): Long, Philip L. ; Hartmann, David C.. -- Classification(s): LCC : Z699 ; DC : 025.3/028/54. -- Subject Heading(s): LCSH : Machine-readable bibliographic data ; LCSH : On-line bibliographic searching ; LCSH : Library information networks