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{{Short description|Study of using and creating tools to manage spatial information}} ...Tambassi>{{cite book |last1=Tambassi |first1=Timothy |title=The Philosophy of Geo-Ontologies |date=2021 |publisher=Springer |pages = 98, 103 |isbn=978-3- ...

...ctrometry)|characteristics of the sample itself]]. By measuring a material of known isotopic composition, fractionation within the [[Mass spectrometry|ma ...materials are seldom reported. This article aggregates the δ and R values of common and non-traditional stable isotope reference materials. ...