TY - JOUR AU - Harvey, Allan AU - Lovell-Smith, J AU - Feistel, Rainer AU - Hellmuth, Olaf AU - Bell, Stephanie AU - Heinonen, M AU - Cooper, J C2 - Metrologia DA - 2015-12-15 DO - https://doi.org/10.1088/0026-1394/53/1/R40 LA - en M1 - 53 PB - Metrologia PY - 2015 TI - Metrological challenges for measurements of key climatological observables, Part 4: Atmospheric relative humidity ER -