Preface -- The preface gives an author a chance to write his own review of the book. A review should state what the author tried to do, and why. It should also state whether he succeeded, but on this point only the judgment of the reader counts. Briefly, the aim here is to teach some theory of sampling as met in large-scale surveys in government and industry, and to develop in the student some power and desire for originality in dealing with problems of sampling.