In the legal search the primary sources are the laws. Tips for the U.S. legal documents you do not need to type the exact citation. On the contrary, for the legal citation for jurisdiction outside of the U.S. you will need the exact citation.
"This new collection contains documents illuminating many aspects of eighteenth-century history, from the widespread use of automated workflow during the Industrial Revolution to the shaping of a new democratic system during the American Revolution."
"Coverage also includes Nicholas Hawksmoor's churches, John Harrison's longitude clocks, India's early days in the British empire, and the scandalous tenure of Britain's first prime minister, Sir Robert Walpole (1721-1742)."
"Parliamentary Papers are the most detailed primary source for nineteenth-century Britain, its colonies, and the wider world. They are the working documents of government for all areas of social, political, economic, and foreign policy. They influenced public opinion and social and political philosophy, and provided a forum for the ideas of hundreds of thinkers, among them Jenner, Arnold, Trollope, Mill, Faraday, Babbage, Telford, and Brunel."
"Research the history of slavery in America and the world with this award-winning HeinOnline collection. Discover a multitude of essential legal and historical materials relating to the institution of slavery."