Gain a lifetime of experience from the inventor of test marketing and coupon sampling -- Claude C. Hopkins. Here, you'll get two landmark works in one, and discover his fixed principles and basic fundamentals that still prevail today.
We are influenced by our surroundings. The prosperous mingle with the prosperous, so do those of certain likes and inclinations. The higher we ascend the farther we proceed from ordinary humanity. That will not do in advertising. I have seen.
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