Scholarly articles on Advertising, Public Relations and Journalism & Mass Communication can be found by searching the indexes & databases listed below. Material covering each of those areas is interspersed in most of these databases. For example, you'll find some substantial hits on all the three areas if you searched "Sociological Abstracts".
Before diving into any of them, it is advisable to start with ISU Library's catalog "Quick Search" as it enables you to quickly see what is available including from a variety of databases.
If you are looking for other resources such as Market Share Reports, Company Information, Audience & Consumer Analysis data, Psychographic & Demographics, e.t.c., this separate guide can be a helpful starting point.
>For full description of the indexes & databases listed below, click here