Edmund G. Gress, The Art & Practice of Typography
“ Among the users of the booklet as a publicity medium are railroads, cities, hotels, real-estate companies, banks, clothiers, educational institutions, printers, and manufacturers of automobiles, musical instruments, cameras, and tools and equipment of many kinds. If one wishes to purchase intelligently a piano or other expensive article he obtains a booklet on the subject, and whether he buys or not depends largely upon the impression obtained from the booklet ”
