Probably the first book on the application of hynosis in advertising. Gérin was professor at the Institut commercial de Paris, and his book was published in a series on "Les procedés modernes de vente." His book inclu…
Probably the first book on the application of hynosis in advertising. Gérin was professor at the Institut commercial de Paris, and his book was published in a series on "Les procedés modernes de vente." His book inclu…
