Advances in space research: vol. 1, no. 7, planetary interiors: edited by H. Stiller and R. Z. Sagdeev, 263 pp; No. 8, progress in planetary exploration, edited by R. W. Shorthill, M. Ya. Marov and J. A. M. McDonnell, 224 pp.; No. 10, sessions on remote sensing, edited by A. B. Kahle, G. Weill, and W. D. Carter, 314 pp.; Pergamon, 1981; $350 per volume of approximately 3500 pages