Contrary to popular opinion, there is not one certain source that contains all of the knowledge on a particular subject. This is especially true in medicine. Any research that a person can do can be used to enlighten doctors on remedies that they may have formerly not known. In this manner, a book on allergies can be conducive to an effective remedy. Это и многое другое вы найдете в книге The Allergy Saving Book (Martha Grace Hart)