[
 {
  "value": "64.419",
  "sigma": "0.058",
  "source": "Bailey et al., Nature 268, 301 (positive muons)",
  "year": "1977",
  "provenance": "in house: RESULTS-1-7 section 1, atlas 24-f044",
  "pooled": "yes"
 },
 {
  "value": "64.368",
  "sigma": "0.029",
  "source": "Bailey et al., Nature 268, 301 (negative muons)",
  "year": "1977",
  "provenance": "in house: RESULTS-1-7 section 1, atlas 24-f044",
  "pooled": "yes"
 }
]