Advances in Plant Nutrition, Vol. 2. Edited by Bernard Tinker and André Läuchli. Molecular Biology and Crop Improvement. By R. B. Austin with R. B. Flavell, I. E. Henson and H. J. B. Lowe. Crop Productivity - Research Imperatives Revisited (International Conference held at Boyne Highlands Inn, 1-318 October 1985 and Airlie House, 11-13 December, 1985). Edited by Martin Gibbsand Carla Carlson Haploids of Higher Plants in Vitro. Edited by H. Hu and H.-Y. Yang Die Blüte. Eine Einführung in Struktur und Funktion, Ökologie und Evolution der Blüten. By Dieter Hess. Mechanisms of Resistance to Plant Diseases. Advances in Agricultural Biotechnology, Volume 17. Edited by R. S. S. Fraser. British Fungus Flora, Volume 4, Pluteaceae: Pluteus and Volvariella. By P. D. Orton. Nuclear Magnetic Resonance. Modern Methods of Plant Analysis, New Series, Volume 2. Edited by H. F. Linsjens and J. F. Jackson. Immunology in Plant Science. Edited by Trevor L. Wang.