Text ( visual ) : unmediated Airborne reconnaissance XV : 23-24 July 1991, San Diego, California / Thomas W. Augustyn, Paul A. Henkel, chairs/editors ; sponsored and published by SPIE--the International Society for Optical Engineering. -- Bellingham, Wash., USA : SPIE , c1991. -- vii, 230 p. : ill. ; 28 cm. -- (Proceedings / SPIE -- the International Society for Optical Engineering ; v. 1538). -- "Part of a three-conference program on Photography and Videography held at SPIE's 1991 International Symposium on Optical Applied Science and Engineering, 21-26 July 1991, in San Diego, California"--P.v ; Includes bibliographical references and index. -- ISBN 081940666X ; (BA26205352) ; https://ci.nii.ac.jp/ncid/BA26205352 Author Heading(s): Augustyn, Thomas W. ; Henkel, Paul ; Society of Photo-optical Instrumentation Engineers. -- Classification(s): LCC : UG760 ; DC20 : 623/.71. -- Subject Heading(s): LCSH : Aerial reconnaissance -- Congresses ; LCSH : Aerial reconnaissance -- Equipment and supplies -- Congresses