These data came from http://datamarket.com/data/list/?q=provider:tsdl and are provided under the following default open license https://datamarket.com/data/license/0/default-open-license.html

The original source for the data comes from: Sales, Source: Abraham & Ledolter (1983), in file: data/adv_sales, Description: More advertising and sales data: 36 consecutive monthly sales and advertising expenditures of a dietary weight control product.