» Heron of Alexandria    Features biography with references and links.    http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Heron.html

» Heron of Alexandria by Michael Lahanas    Features inventions, biography and science. Includes links, photos, articles, list of his books and detailed descriptions.    http://www.mlahanas.de/Greeks/HeronAlexandria.htm

» Heron of Alexandria (ca. 75 AD)    Greek mathematician who was mainly interested in practical studies in mechanics and engineering, best known for Heron's Formula.    http://scienceworld.wolfram.com/biography/Heron.html

» Mathworld - Heron's Formula    An important theorem in plane geometry. Describes it in detail while relating other formulas.    http://mathworld.wolfram.com/HeronsFormula.html

» The Pneumatics of Hero of Alexandria    Translated for and edited by Bennet Woodcroft. Contains a list of 78 inventions with detailed explanations and drawings.    http://www.history.rochester.edu/steam/hero/index.html