The Southern Permian Basin Atlas (SPBA) was published in 2010 by TNO – Geological Survey of the Netherlands, as the result of a joint research project by the Geological surveys of Belgium, Denmark, Germany, the Netherlands, Poland and the United Kingdom, as well as universities and sponsors from the oil and gas industry.
The digital version of the atlas can now be downloaded for free on NLOG.nl . The GIS maps and project database can be bought on DVD through the order form.