The Natural History Complete Latin text, occasionally commented; linked when possible to translations. http://penelope.uchicago.edu/Thayer/E/Roman/Texts/Pliny_the_Elder/home.html

Cato's Monostichs Scanned and translated by James Marchand from Leopold Zatocil. Reedited and marked up by Martin Irvine and provided online by the University of Pennsylvania. http://www.georgetown.edu/faculty/jod/texts/monostich.html