Reviews in computational chemistry, vols. 6 and 7. Edited by K. B. Lipkowitz, D. B. Boyd, VCH, New York 1995, vol. 6: xix, 480 pp., hardcover, DM 175.00, ISBN 1‐56081‐667‐8; vol. 7: xxiv, 414 pp., hardcover, DM 176.00, ISBN 1‐56081‐915‐4