1. 2011-10-31 [geos-devel] Re: [GEOS] #482: UnaryUnion of a non-sim geos-deve GEOS 2. 2011-10-03 [geos-devel] Re: [GEOS] #482: UnaryUnion of a non-sim geos-deve GEOS 3. 2011-10-03 [geos-devel] [GEOS] #482: UnaryUnion of a non-simple geos-deve GEOS