{
  "id": "UN985",
  "name": "British thermal unit (th) per degree Rankine",
  "ml_name": "ip_Btu_{th}.deg_R-1",
  "symbol": "Btu_{th}.\u00b0R-1",
  "reference": "https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8#B"
}