Key points are not available for this paper at this time.
Advertising Men's League and the National As- sociation of Advertising Managers, for his constant interest and assistance, and for a great amount of data, more specifically referred to in the text.But, above all, the very existence of the book, the opportunity of preparing it, and very much of such concreteness and value as the book may con- tain are due to the untiring activity and the stimulating professional ideals of Mr. Wm.H. Inger-
Scott et al. (Thu,) studied this question.