Geological map info clipped together in packet, 2002. Info from Geological exhibit. Clipping on lack of localn radiation from Christian Gronau, undated. Emails on local geology, 2011-2015
Geological map info clipped together in packet, 2002. Info from Geological exhibit. Clipping on lack of localn radiation from Christian Gronau, undated. Emails on local geology, 2011-2015