The data were collected by hand, and entered into an xls spreadsheet, using these sources:
Annual editions of the Writers� & Artists� Yearbook, (London: A&C Black, 1914-19);
the British Library catalogue;
SOLO, the online catalogue of the Bodleian Library, University of Oxford;
the Reading Experience Database hosted by the Open University (http://www.open.ac.uk/Arts/RED/);
H. Simonis, The Street of Ink (London: Cassell & Co, 1917);
Joseph McAleer, Popular Reading and Publishing in Britain, 1914�1950 (Oxford: Oxford University Press, 1992);
Michael Ashley, The Age of the Storytellers. British Popular Fiction Magazines, 1880-1920 (London: Oak Knoll Press and The British Library, 2006);
Patrick Belk�s Pulp Magazine Project (http://www.pulpmags.org);
the digitised periodicals in Stephen Donovan�s ConradFirst site (http://www.conradfirst.net/);
the Fiction Mags Index, edited by William B Contento and Phil Stephensen-Payne (http://www.philsp.com/homeville/fmi/0start.htm).