Theology WebSite on Irenaeus

The Theology Website's Electronic Text Index has recently added some new texts including Irenaeus's Against Heresies. Somewhat annoyingly, though, there is no indication of where this text is derived from. The page has some other texts of interest including some Nag Hammadi material, but it is not clear to me whether or not copyright clearance has been obtained on these (and judging from the annotation under the Gilgamesh epic, one might guess that it hasn't).