The first monograph of this type was published by I DF in 1972 and was a best seller. The new monograph produced by the same group of international experts, augmented by representatives from a few additional countries is expected to be equally popular. It includes updated chapters of the previous book and several new chapters e.g. on quality assurance, problems specific to warm countries, basic requirements for the UHT plant, the market for UHT milk in the F .R. of Germany, etc.