MacTutor History of Mathematics: Ramus  
   Biography and bibliography, with links to related topics.
   http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Ramus.html

Peter Ramus  
   Biography by Chris Dawson, noting this French thinker's legacy for rhetoric and education.
   http://www.lcc.gatech.edu/gallery/rhetoric/figures/ramus.html

Catholic Encyclopedia: Peter Ramus  
   Article by William Turner on this early humanist and logician.
   http://www.newadvent.org/cathen/12638b.htm

History of Rhetoric: Peter Ramus  
   Brief note on this figure's historical status, by Wayne Stein.
   http://www.libarts.ucok.edu/english/faculty/stein/rhetoric/peter_ramus.htm

Champions: Petrus Ramus  
   Note on this thinker's work and legacy.
   http://www.alcott.net/alcott/home/champions/Ramus.html

Columbia Encyclopedia: Ramus, Petrus  
   Concise entry from the 2001 edition.
   http://www.bartleby.com/65/ra/Ramus-Pe.html

Catalog of the Scientific Community: Ramus, Peter  
   Biographical facts compiled as part of the Galileo Project.
   http://galileo.rice.edu/Catalog/NewFiles/ramus.html