Text ( visual ) : unmediated National service in war and peace, 1925-1975 / prepared by members of the technical staff, Bell Telephone Laboratories ; M.D. Fagen, editor. -- [S.l.] : Bell Telephone Laboratories , 1978. -- xv, 757 p. : ill. ; 24 cm. -- (A history of engineering and science in the Bell System ; [2]). -- Includes bibliographical references and index. -- ISBN 0932764002 ; (BA46780615) ; https://ci.nii.ac.jp/ncid/BA46780615 Author Heading(s): Bell Telephone Laboratories, Inc. ; Fagen, M. D.