About: http://webisa.webdatacommons.org/451248968

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In this paper, the 17 symmetry types in a plane, known as the wallpaper groups, are studied and discussed.
http://www.w3.org/ns/prov#wasQuotedFrom	science.gov