Platelet-Vessel Wall InteractionsEdited by R. M. Pittilo, S. J. Machin, Springer-Verlag, Heidelberg 1988. 198 pages. Price DM 128Platelet Heterogeneity: Biology and PathologyEdited by J. Martin, A. Trowbridge, Springer-Verlag, Heidelberg 1990. 270 pages. Price DM228.Bone Marrow Transplantation in ChildrenEdited by F. L. Johnson, C Pochedly, Raven Press, New York, 1990. 576 pages. Price $125.00.