At the Open Text Book project.
“Welcome to the Australian Soil Resource Information System.”
By David Mertz, the online edition.
- TechXtra, which searches portions of the Deep Web for engineering, maths and computing
- Intute: Science, Engineering and Technology, an annotated directory of good resources on the Web for engineering, geography, the natural sciences, mathematics, and allied fields. Fairly solid, at least the hydrology and hydrogeology section is
Hat tip to the crew from PSE library at UQ.