Text ( visual ) : unmediated Advances in global/regional descriptions of ionospheric parameters : proceedings of URSI/COSPAR Symposium held in Athens, Greece, 1-4 October, 1991 / edited by K. Rawer, W.R. Piggott and A.K. Paul. -- New York : published for the Committee on Space Reseach by Pergamon Press, 1992. -- vi, 133 p. : ill. ; 28 cm. -- (Advances in space research ; vol. 13, no. 3). -- Includes bibliographical references and index. -- ISBN 0080421881 ; (BA18733581) ; https://ci.nii.ac.jp/ncid/BA18733581 Author Heading(s): URSI/COSPAR Symposium ; Rawer, K. (Karl) ; Piggott, W. R. ; Paul, A. K.