Use these databases and books to gather more in-depth information about the company or companies in which you're interested.
Value Line: Investment information service with quarterly reports on 1,700 stocks of publicly-owned companies whose shares are traded in the U.S.
Morningstar: Similar to Value Line in its quarterly coverage of individual stocks. Also covers mutual funds.
Gale International Directory of Company Histories: 9,500 in-depth company histories in a multi-volume set. Use the index in the most recent volume to find coverage of your company.