00761cam a22001694a 4500952016300000999001700163020002300180020002000203082001600223100002100239245007000260260005100330300003300381500003700414650013300451942000700584  00104070aLCCbLCCd2019-04-16ePak Book Corporationg5990.68l0o543.55 JOHp38459r2019-04-16 00:00:00t1uRiphah international universityw2019-04-16yBK  c24413d24413  a9780750307543 (hb)  a0750307544 (hb)  a543.55bJOH1 aJohnston, Sean F12aA history of light and colour measurementbscience in the shadows  aBristolbInstitute of Physics Publishingc2001  axi, 281 p.b: ill.c; 24 cm.  aIncludes bibliography and index.17aColour measurementaPhysicsvRadiation-Measurement	vPhysical photometryvHistory-LightvRadiant heatvRadiometryvLight	vRICAS  cBK