to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Ashley, Mike (2007). Gateways to Forever: The Story of the Science-Fiction Magazines from 1970 to 1980. Liverpool: Liverpool University Press. pp. 479-481. ISBN978-1-84631-003-4.
Ashley, Mike (2016). Science Fiction Rebels: The Story of the Science-Fiction Magazines from 1981 to 1990. Liverpool: Liverpool University Press. pp. 440-442. ISBN978-1-78138-260-8.
Ashley, Mike (2022). The Rise of the Cyberzines: The Story of the Science-Fiction Magazines from 1991 to 2020. Liverpool: Liverpool University Press. pp. 409-11. ISBN978-1-80085-648-6.
Notes:
Ashley's data comes from two sources: the annual statement of circulation published in the magazine, and additional data provided to Locus magazine each year starting in 2004.
The data runs approximately from summer of one year through summer of the next year, so two year dates are given for each data point.
No data is available for 1979-1980.
Digital subscription numbers for the first few years are estimated.
Captions
Circulation figures for Asimov's Science Fiction magazine up to 2020