This link takes you to Rod Hay's site at McMaster University in Canada. Professor Hay has placed a large number of texts on line, listed by author's name.
A site provided by the Federal Reserve Bank of San Francisco.
Lots of material on and about Friedrich Hayek and the work that has followed from his ideas.
This link takes you to the History of Economics Society's home page. From there you can investigate a number of possibilities.
Self explanatory. Lots of manuscripts written by Marx can be found at this location.
One of the giants in twentieth-century Austrian economics, Mises has many followers today who keep his spirit alive. The Institute works to promote the dissemination of Austrian economic analysis.
A wealth of links to other pages, as well as to primary documents, can be found at this new site. Check it out!
A bit of information on Francois Quesnay.