The American Lawyer is the principal trade magazine of the U.S. legal industry. Recent issues of the magazine are available in most large law libraries.
The American Lawyer Website posts selected articles from the current issue. Surveys from the past year -- including the Am Law 100 survey -- are posted on Lists and Rankings page of Law.com.
Articles from back issues are on Westlaw (AMLAW) starting with 1995.
Entire back issues are available from the publisher (call the Circulation Dept. at 212-973-2810).