Computer Retrieval of Information on Scientific Projects Thesaurus Material Natural Resource Source
http://sweet.jpl.nasa.gov/2.3/matrNaturalResource.owl#Oil http://purl.bioontology.org/ontology/CSP/1744-0672 LOOM
http://sweet.jpl.nasa.gov/2.3/matrNaturalResource.owl#Coal http://purl.bioontology.org/ontology/CSP/0552-1596 LOOM