| http://www.w3.org/ns/prov#value | - TECHNICAL FIELDThe invention relates to methods for tracking the effectiveness of telephone responses to print, mail, electronic, broadcast and other media advertising and is particularly suited to the operation of a real estate brokerage office.BACKGROUND OF THE INVENTIONThe most common current practice in the marketing of products and services in various business, such as in the real estate indu
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