The C-Band All-Sky Survey (C-BASS): constraining diffuse Galactic radio emission in the North Celestial Pole region - Dickinson, C; Barr, A; Chiang, H C; Copley, C; Grumitt, R D P; Harper, S E; Heilgendorff, H M; Jew, L R P; Jonas, J L; Jones, Michael E; Leahy, J P; Leech, J; et al. (Monthly Notices of the Royal Astronomical Society, 2019)