The sixth rendition of this chronicle of Progress in Hematology has acquired an international flavor. Seven of the 20 contributors are from England. As in previous editions, the perspicacity of editors Brown and Moore is revealed in their selection of pertinent titles and authors. We have Dacie and Worlledge writing on "Autoimmune Hemolytic Anemias" (a gem-like précis of the 1967 Part III edition of the Dacie classic); Rizza and Biggs discuss treatment in hemophilia and Von Willebrand's disease; Gräsbeck on intrinsic factor and vitamin B12 transport mechanisms; McIntyre and Wagner review and update tracer techniques available in clinical and research hematology. The six remaining chapters enjoy equally luminous authorship.
Perhaps the most vital clinical information is the comprehensive discussion of anti-Rh immunoglobulin, given to Rh-negative mothers during pregnancy or immediately after delivery, which exerts a significant salutary effect upon their risk of becoming sensitized to Rh factor. The impact