Value for natural unit of mass
type: ConstantValue
has unit: KiloGM
informative reference: http://physics.nist.gov/cuu/Constants/bibliography.html
standard uncertainty: 0.000000000000000000000000000000000000045
standard uncertainty SN: 4.5E-38
value: 0.000000000000000000000000000000910938215
value SN: 9.10938215E-31
website: http://physics.nist.gov/cgi-bin/cuu/Value#mid