HeinOnline This link opens in a new windowHeinOnline is the world's largest fully searchable, image-based government document and legal research database. It contains comprehensive coverage from inception of both U.S. statutory materials and more than 2,300 scholarly journals, all of the world's constitutions, all U.S. treaties, collections of classic treatises and presidential documents, and access to the full text of state and federal case law powered by Fastcase.