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APA Citation
Owens, M. J., Cliver, E., McCracken, K. G., Beer, J., Barnard, L., Lockwood, M., Rouillard, A., Passos, D., Riley, P., Usoskin, I., & Wang, Y. (n.d.). near‐Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions. Journal of geophysical research, 121(7), 6048–6063. http://access.bl.uk/ark:/81055/vdc_100035675217.0x000035