{
  "id": "UN991",
  "name": "British thermal unit (th) per pound degree Fahrenheit",
  "ml_name": "ip_Btu_{th}.(lb.deg_F)-1",
  "symbol": "Btu_{th}.(lb.\u00b0F)-1",
  "reference": "https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8#B"
}