<https://allcivilstandard.com/astm-d-5639-d5639m-95-reapproved-2000-pdf-free-download/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://allcivilstandard.com/astm-d-5639-d5639m-95-reapproved-2000-pdf-free-download/>