JStor has vastly improved its search capabilities. The new search form (called “Article Locator”) is at http://www.jstor.org/search/ArticleLocatorSearch. It’s similar to, but nicer than, their “Advanced Search.”
The Article Locator is a new search form that allows you to find a specific article in an easy, fill-in-the-blank form. To locate a single article, enter as much information as you have from an article reference or citation. The form will search multiple fields of a citation simultaneously, such as author name, article title, journal title, volume/issue information, year, etc. If an exact match to your citation cannot be found, you will be presented with search results that most closely match the citation entered.