Isis CB, Available through WorldCat
You can now search the Isis CB through WorldCat.org directly. Below, you should find a search box, which you can use. Note, however, that the search box does not show up on some browsers. If you do not see the search box, simply go to http://www.worldcat.org/ and enter the code xisi2 along with any other search term and you will retrieve only entries from the Isis CB database.
The search will yield results from the bibliographies of 1974 up to last year. Each year HSS will update the site to include new data, so that it will always be one year behind. In order to have access to the most recent year’s bibliography, one must be a member of the History of Science Society or have access to the HSTM database through a subscribing library.