The Library of Congress classification for marketing is HF 5415-5416. Wholesale Trade Browsing in any of these areas may lead to the discovery of valuable material in addition to the specific items listed in this guide. See the volumes titled Library of Congress Subject Headings for a complete list of possible headings and cross references. If you know a specific author or title, you may use that information to access listings in the online catalog also.
Many excellent resources are available on the Internet.