About: http://webisa.webdatacommons.org/321599511

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	At first, one of the gases (He, N2, Ar or Kr) or a suitable mixture of these gases appropriate for the absorption edge tabulated in the program starts to flow from the gas-distribution system to the ionization chambers.
http://www.w3.org/ns/prov#wasQuotedFrom	iucr.org